Year/Period |
1950-1960 |
Maker |
BLEEKER |
Country |
The Netherlands |
Signature |
BLEEKER / HOLLAND // NOI [in logo] / No 85 / …. |
Category |
Other optical equipment |
Subcategory |
Refractometers |
Inventory number |
SM 168 |
Achromatic magnifier 8×
BLEEKER
1940-1955
Achromatic magnifier 12×
BLEEKER
1940-1950
Porro prism binocular 6×30
BLEEKER
ca. 1950
Porro prism binocular 7×50
BLEEKER
ca. 1953