| Image | Source | Observations
      from the source | Maker
      (or retailer) | 
     
      | 
 | American Optical’s catalogue (1950s) | Laboratory microscope No. 17 | American
      Optical | 
     
      | 
 | American Optical’s catalogue (1950s) | Brewer’s microscope | American Optical | 
     
      | 
 | American Optical’s catalogue (1950s) | Microscope for water and sewage | American Optical | 
     
      | 
 | American Optical’s catalogue (1950s) | Pathologist microscope | American Optical | 
     
      | 
 | American Optical’s catalogue (1950s) | Pathologist microscope | American Optical | 
     
      | 
 | American Optical’s catalogue (1950s) | Phase microscope | American Optical | 
     
      | 
 | American Optical’s catalogue (1950s) | Research microscope | American Optical | 
     
      | 
 | American Optical’s catalogue (1950s) | Textile microscope | American Optical | 
     
      | 
 | American Optical’s catalogue (1950s) | Veterinarian’s and breeder's microscope | American Optical | 
     
      | 
 | Hansen, J. L. et al. (1974) The Billings
      microscope collection. Armed Forces Institute of Pathology, Washington,
      USA | American Optical (1948) | American Optical | 
     
      | 
 | American Optical’s catalogue (1950s) | Interference microscope | AO Baker | 
     
      | 
 | American Optical – Spencer (pamphlet M89-749) | Series N15MLH | AO
      Spencer | 
     
      | 
 | American Optical’s catalogue (1950s) | Bacteria counting microscope | American Optical | 
     
      | 
 | American Optical’s catalogue (1950s) | Laboratory microscope |   | 
     
      | 
 | American Optical’s catalogue (1950s) | Mold counting microscope | American Optical | 
     
      | 
 | American Optical’s catalogue (1950s) | Series 15 | American Optical | 
     
      | 
 | Macalastar Bicknell’s catalogue (1955) | Bacteria count microscope 15MLHYZ | AO Spencer | 
     
      | 
 | American Optical’s catalogue (1950) | Spencer phase
      microscope | AO Spencer | 
     
      | 
 | Macalastar Bicknell’s catalogue (1955) | Microscope 15MLH | AO Spencer | 
     
      | 
 | Macalastar Bicknell’s catalogue (1955) | Microscope 17MHA | AO Spencer | 
     
      | 
 | Macalastar Bicknell’s catalogue (1955) | Microscope C15QLG | AO Spencer | 
     
      | 
 | Macalastar Bicknell’s catalogue (1955) | Phase microscope 8MLSP | AO Spencer | 
     
      | 
 | Macalastar Bicknell’s catalogue (1955) | Research microscope C5LRG | AO Spencer | 
     
      | 
 | Arthur Thomas’s catalogue (1914) | Microscope Bausch & Lomb new binocular
      type KD | Bausch & Lomb | 
     
      | 
 | Bausch & Lomb’s catalogue (1940s) | Laboratory microscope stand HSEAT | Bausch & Lomb | 
     
      | 
 | Bausch & Lomb’s catalogue (1940s) | Microscope stand HSEA | Bausch & Lomb | 
     
      | 
 | Bausch & Lomb’s catalogue (1940s) | Medical microscope CBA-8 | Bausch & Lomb | 
     
      | 
 | Bausch & Lomb’s catalogue (1940s) | Medical microscope CTA-8 | Bausch & Lomb | 
     
      | 
 | Bausch & Lomb’s catalogue (1959) | Laboratory microscope TBV-8 | Bausch & Lomb | 
     
      | 
 | Bausch & Lomb’s catalogue (1959) | Laboratory microscope TBV-69 | Bausch & Lomb | 
     
      | 
 | Bausch & Lomb’s catalogue (1959) | Laboratory microscope TPV-9 | Bausch & Lomb | 
     
      | 
 | Bausch & Lomb’s catalogue (1959) | Laboratory microscope TPR-8 | Bausch & Lomb | 
     
      | 
 | Bausch & Lomb’s catalogue (1959) | Laboratory microscope TBV-69 | Bausch & Lomb | 
     
      | 
 | Bausch & Lomb’s catalogue (1959) | Laboratory microscope TTBV-69 | Bausch & Lomb | 
     
      | 
 | Bausch & Lomb’s catalogue (1959) | Laboratory microscope TTBR-59 | Bausch & Lomb | 
     
      | 
 | Bausch & Lomb’s catalogue (1959) | Dynoptic microscope TBV-69 | Bausch & Lomb | 
     
      | 
 | Bausch & Lomb’s catalogue (1959) | Dynoptic microscope TBV-8 | Bausch & Lomb | 
     
      | 
 | Bausch & Lomb’s catalogue (1959) | Dynoptic microscope TTBV-69 | Bausch & Lomb | 
     
      | 
 | Bausch & Lomb’s catalogue (1959) | Microscope TBV-69 | Bausch & Lomb | 
     
      | 
 | Bausch & Lomb’s catalogue (1959) | Microscope TPR-8 | Bausch & Lomb | 
     
      | 
 | Bausch & Lomb’s catalogue (1959) | Microscope TPV-9 | Bausch & Lomb | 
     
      | 
 | Bausch & Lomb’s catalogue (1959) | Microscope TTBR-59 | Bausch & Lomb | 
     
      | 
 | Bausch & Lomb’s catalogue (1959) | Series T | Bausch & Lomb | 
     
      | 
 | Bausch & Lomb’s catalogue (1959) | Series TT microscope | Bausch & Lomb | 
     
      | 
 | Bausch & Lomb’s catalogue (brochure
      D-150, 20, VII-40 L.H.)) | Medical microscope | Bausch & Lomb | 
     
      | 
 | Bausch & Lomb’s catalogue (brochure
      D-150, 20, VII-40 L.H.)) | Medical microscope | Bausch & Lomb | 
     
      | 
 | Hansen, J. L. et al. (1974) The Billings
      microscope collection. Armed Forces Institute of Pathology, Washington,
      USA | Bausch & Lomb (c. 1919) | Bausch & Lomb | 
     
      | 
 | Hansen, J. L. et al. (1974) The Billings
      microscope collection. Armed Forces Institute of Pathology, Washington,
      USA | Bausch & Lomb (c. 1930) | Bausch & Lomb | 
     
      | 
 | Lentz, T. L. (2017) Lentz Microscopy and
      Histology Collection. Peabody Museum of Natural History at Yale
      University | B & L binocular compound microscope,
      1945 | Bausch & Lomb | 
     
      | 
 | Macalastar Bicknell’s catalogue (1955) | Metallurgical microscope model CMET | Bausch & Lomb | 
     
      | 
 | Macalastar Bicknell’s catalogue (1955) | Microscope model EBN-98 | Bausch & Lomb | 
     
      | 
 | Macalastar Bicknell’s catalogue (1955) | Microscope model TBV-69 | Bausch & Lomb | 
     
      | 
 | Will Corporation’s catalogue (1920) | Microscope CAE - binocular (Bausch &
      Lomb) | Bausch & Lomb | 
     
      | 
 | Conrad Beck (1921) | Binocular high and low power microscope Beck | Beck | 
     
      | 
 | FE Becker’s catalogue (1924) | Binocular microscope
      (from R & J Beck) | Beck | 
     
      | 
 | R & J Beck’s
      catalogue (1920s – 1930s) | Combined binocular and monocular microscope | Beck | 
     
      | 
 | R & J Beck’s catalogue (1930) | Beck microscope No. 29 F.B. | Beck | 
     
      | 
 | R & J Beck’s catalogue (1930) | No. 29B London
      microscope | Beck | 
     
      | 
 | R & J Beck’s catalogue (1951) | No.
      48 binocular and monocular microscope | Beck | 
     
      | 
 | R & J Beck’s catalogue (1951) | No.
      48 binocular and monocular microscope | Beck | 
     
      | 
 | R & J Beck’s catalogue (1951) | Laboratory metallurgical microscope | Beck | 
     
      | 
 | F Koristka’s catalogue
      (1928) |   | Koristka | 
     
      | 
 | F Koristka’s catalogue
      (1928) | Stativo Ubiplast | Koristka | 
     
      | 
 | Ernst
      Leitz’s catalogue (1951) | Medical
      microscope | Leitz | 
     
      | 
 | Ernst
      Leitz’s catalogue (1951) | Microscope
      model BS 47/92K | Leitz | 
     
      | 
 | Gallenkamp’s catalogue (1939) | Large mono-binocular microscope stand BBT
      28/83 (Leitz) | Leitz | 
     
      | 
 | Leitz’s catalogue (1932) | Stand ABT 28/84 | Leitz | 
     
      | 
 | Leitz’s catalogue (1932) | Stand AST with binocular body | Leitz | 
     
      | 
 | Leitz’s catalogue (1932) | Stand BBT 28/83 | Leitz | 
     
      | 
 | Leitz’s catalogue (1954) | Statif de microscope B avec lampe applicable
      Monlafix | Leitz | 
     
      | 
 | Leitz’s catalogue (1954) | Microscope monoculaire et binoculaire B | Leitz | 
     
      | 
 | Lentz, T. L. (2017) Lentz Microscopy and
      Histology Collection. Peabody Museum of Natural History at Yale
      University | Leitz Binocular Microscope, 1947 | Leitz | 
     
      | 
 | Jouan’s catalogue (1933) | Grand modele (Lemardeley)   | Lemardeley | 
     
      | 
 | Jouan’s catalogue (1933) | Modele moyen (Lemardeley)   | Lemardeley | 
     
      | 
 | Flatters and Garnett’s catalogue (1963) | Prior binocular
      research | Prior | 
     
      | 
 | C. Reichert’s catalogue (c. 1950) | Mono-binocular microscope CSM | Reichert | 
     
      | 
 | Lentz, T. L. (2017) Lentz Microscopy and
      Histology Collection. Peabody Museum of Natural History at Yale
      University | Reichert CSM Binocular Microscope, 1952 | Reichert | 
     
      | 
 | Hansen, J. L. et al. (1974) The Billings
      microscope collection. Armed Forces Institute of Pathology, Washington,
      USA | Spencer Lens co. (c. 1920) | Spencer | 
     
      | 
 | Hansen, J. L. et al. (1974) The Billings
      microscope collection. Armed Forces Institute of Pathology, Washington,
      USA | Spencer Lens Co. (1932) | Spencer | 
     
      | 
 | Lentz, T. L. (2017) Lentz Microscopy and
      Histology Collection. Peabody Museum of Natural History at Yale
      University | AO Spencer Binocular Microscope, 1947 | Spencer | 
     
      | 
 | Spencer’s catalogue (1924) | Microscope No. 2 | Spencer | 
     
      | 
 | Spencer’s catalogue (1924) | Microscope No. 3 | Spencer | 
     
      | 
 | Spencer’s catalogue (1924) | Microscope No. 4 | Spencer | 
     
      | 
 | Spencer’s catalogue (1929; 1930) | Binocular microscope
      No. 4 | Spencer | 
     
      | 
 | Spencer’s catalogue (1929) | New binocular
      microscope No. 4-MH | Spencer | 
     
      | 
 | Spencer’s
      catalogue (1929) | Binocular microscope No. 4 | Spencer | 
     
      | 
 | Spencer’s
      catalogue (1929) | Binocular microscope No. 4-MH | Spencer | 
     
      | 
 | Spencer’s catalogue (1930) | New binocular
      microscope No. 4M | Spencer | 
     
      | 
 | Spencer’s catalogue (1937) | Medical microscope 13-MLH | Spencer | 
     
      | 
 | Spencer’s catalogue (1937), Medical Microscopes | 13-MH | Spencer | 
     
      | 
 | Spencer’s catalogue (1937), Medical Microscopes | 13-MLH | Spencer | 
     
      | 
 | Spencer’s catalogue (1937), Medical Microscopes | 13-MLH | Spencer | 
     
      | 
 | Spencer’s catalogue (1950) | Phase
      microscope No. 18 | Spencer | 
     
      | 
 | Spencer’s catalogue (c. 1950) | Convertible
      and binocular microscope No. 13 | Spencer | 
     
      | 
 | Spencer’s catalogue (c. 1950) | Dark
      field microscope | Spencer | 
     
      | 
 | Spencer’s catalogue (c. 1950) | Dark
      field microscope | Spencer | 
     
      | 
 | Spencer’s catalogue (c. 1950) | Mold count microscope | Spencer | 
     
      | 
 | Spencer’s catalogue (c. 1950) | Research
      microscope | Spencer | 
     
      | 
 | Spencer’s catalogue (c. 1950) | Research
      microscope | Spencer | 
     
      | 
 | Spencer’s catalogue (c. 1950) | Research
      microscope No. 3 | Spencer | 
     
      | 
 | Spencer’s catalogue (c. 1950) | Textile
      microscope | Spencer | 
     
      | 
 | Jouan’s catalogue (1933) | Microscope binoculaire (Stiassnie) | Stiassnie | 
     
      | 
 | Watson’s catalogue (1924; c1930) | Bactil microscope | Watson | 
     
      | 
 | Lentz, T. L. (2017) Lentz Microscopy and
      Histology Collection. Peabody Museum of Natural History at Yale
      University | Zeiss Binocular Microscope, 1932 | Zeiss | 
     
      | 
 | R & J Beck’s
      catalogue (1920s – 1930s) | Angular model microscope | Beck | 
     
      | 
 | Ernst
      Leitz’s catalogue (1954) | Ultropak
      incident light microscope | Leitz | 
     
      | 
 | Bracegirdle
      (2005) A catalogue of the microscopy collections at the science museum,
      London, Little Imp Publications (CD) | Binocular
      London microscope, 1920 - 1925 | Beck | 
     
      | 
 | Bracegirdle
      (2005) A catalogue of the microscopy collections at the science museum,
      London, Little Imp Publications (CD) | M2140
      binocular microscope, 1950 - 1955 | CTS | 
     
      | 
 | Bracegirdle
      (2005) A catalogue of the microscopy collections at the science museum,
      London, Little Imp Publications (CD) | M2150
      research microscope, 1950 - 1960 | CTS | 
     
      | 
 | Bracegirdle
      (2005) A catalogue of the microscopy collections at the science museum,
      London, Little Imp Publications (CD) | M2150
      phase contrast outfit, 1950 - 1955 | CTS | 
     
      | 
 | Bracegirdle
      (2005) A catalogue of the microscopy collections at the science museum,
      London, Little Imp Publications (CD) | Variable
      amplitude phase contrast outfit, c. 1959 | CTS | 
     
      | 
 | Bracegirdle
      (2005) A catalogue of the microscopy collections at the science museum,
      London, Little Imp Publications (CD) | M2150
      research microscope, 1950 - 1955 | CTS | 
     
      | 
 | Bracegirdle
      (2005) A catalogue of the microscopy collections at the science museum,
      London, Little Imp Publications (CD) | Mono/binocular
      outfit, c. 1929 | Leitz | 
     
      | 
 | Bracegirdle
      (2005) A catalogue of the microscopy collections at the science museum,
      London, Little Imp Publications (CD) | Binocular
      microscope, c. 1942 | Leitz | 
     
      | 
 | Bracegirdle
      (2005) A catalogue of the microscopy collections at the science museum,
      London, Little Imp Publications (CD) | Mono-binocular
      microscope, c. 1951 | Leitz | 
     
      | 
 | Bracegirdle
      (2005) A catalogue of the microscopy collections at the science museum,
      London, Little Imp Publications (CD) | High
      power binocular microscope, 1948 | Watson | 
     
      | 
 | Bracegirdle
      (2005) A catalogue of the microscopy collections at the science museum,
      London, Little Imp Publications (CD) | Bactil
      binocular microscope, c. 1951 | Watson | 
     
      | 
 | Bracegirdle
      (2005) A catalogue of the microscopy collections at the science museum,
      London, Little Imp Publications (CD) | Bactil-60
      microscope | Watson | 
     
      | 
 | Lafayette’s
      catalogue (1970) | Micro-plex, binocular, monocular research
      microscope |   | 
     
      | 
 | Flatters
      & Garnett (1929) | Binocular
      bactil microscope | Watson | 
     
      | 
 | Gallenkamp
      (1956) | Microscope
      Bactil | Watson | 
     
      | 
 | Reichert (1955) | Microscope CSM | Reichert | 
     
      | 
 | BBT
      KRAUSS catalogue (1955), Grand Microscope Universel U | Grand
      Microscope Universel X/RC 3 | BBT
      KRAUSS | 
     
      | 
 | BBT
      KRAUSS catalogue (1955), Grand Microscope Universel U | Grand
      Microscope Universel X/TC 3 | BBT
      KRAUSS | 
     
      | 
 | Gallenkamp’s
      catalogue (1956) | Microscope Bactil | Watson | 
     
      | 
 | Watson
      (1950s) | Bactil
      microscope with phase-contrast equipment | Watson | 
     
      | 
 | Will
      Corporation (1957) | Metallurgical
      microscope model DMET | Bausch
      & Lomb | 
     
      | 
 | Will
      Corporation (1957) | Dynoptic
      microscope series T, binocular | Bausch
      & Lomb | 
     
      | 
 | https://americanhistory.si.edu/collections
      (ID number 1991.0881.01.1)   | c.
      1940 | Bausch
      & Lomb | 
     
      | 
 | https://americanhistory.si.edu/collections
      (ID number PG.7237)   | 1916 | Bausch
      & Lomb |