Dutch ophthalmic trial lens set, C 1875
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A Dutch ophthalmic trial lens set with the original testing frames and and lenses, three of them are missing, C 1875. The dutch case constains bic0ncave and Biconvex spherical lenses, without rims with the powers: 2 – 50, prismatic lenseswith powers 5 – 16, three blue strips of glas of verious intenties and a trail frame with two clips on the top to hold the lenses.
Measurements box 16,5 x 18 x 6 cm
