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. 1953
Folding magnifier
ONBEKEND/UNKNOWN
1920-1950
Porro prism binocular 6×30
BLEEKER
ca. 1950
Achromatic stand magnifier
LEITZ
1925-1950