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Year/Period
1955-1965
Maker
Country
The Netherlands
Signature
Unsigned
Category
Other optical equipment
Subcategory
Thread counters
Donated by
P.P. de Bruijn, Zeist, the Netherlands
Inventory number
SM 146
See also SM 217.
Achromatic magnifier 8×
BLEEKER
1940-1955
Achromatic magnifier 12× and 10×
1940-1947
Universal refractometer after Abbe
1950-1960
Refractometer/saccharimeter