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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.
Folding hand magnifier
BLEEKER
1940-2017
Universal refractometer after Abbe
1950-1955
Magnifier
OLDELFT
ca. 1950
1950-1960