Year/Period |
1950-1960 |
Maker |
BLEEKER |
Country |
The Netherlands |
Signature |
(1): CURTIS . SYSTEMS // BLEEKER / HOLLAND // NOI [in logo] / No 45 / 67503 |
Category |
Other optical equipment |
Subcategory |
Refractometers |
Inventory number |
SM 79 |
For information on the color and number of the rings see refractometer color codes (in Dutch).
To see the inside of this instrument we refer to SM 168.
Porro prism binocular 6×30
BLEEKER
ca. 1950
Achromatic magnifier 12× and 10×
BLEEKER
1940-1947
Folding magnifier 8×
BUSCH
1900-1930
Porro prism binocular 7×50
BLEEKER
ca. 1953