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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.
Grating spectroscope
BLEEKER
1950-1960
Folding hand magnifier
1940-2017
Spectroscope
ZEISS
1930-1940
Refractometer or Saccharimeter opened