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 7×50
BLEEKER
ca. 1953
Folding magnifier 8×
BUSCH
1900-1930
Universal refractometer after Abbe
BLEEKER
1950-1955
Porro prism binocular 6×24
BLEEKER
ca. 1950