细节
An optician's trial set,
with concave and convex lenses, a Harman's Scotometer, four colour code wands, an ophthalmic mirror and a pair of trial glasses, in mahogany case with plush-lined lid -- 18½in. (47cm.)
with concave and convex lenses, a Harman's Scotometer, four colour code wands, an ophthalmic mirror and a pair of trial glasses, in mahogany case with plush-lined lid -- 18½in. (47cm.)