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trial case / trial frame
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial case
Europe: France
c.1880
wood; leatherette; brass; glass

Wooden trial case covered in worn black leatherette, with hinged lid. Brass hinges. Two clasps. Purple velvet and silk lining to base and lid. Large range of rimless concave, convex, cylindrical and prismatic lenses, slits and one square lens. 30 pairs spherical and 18 pairs cylindrical marked in dioptres. Lenses hand engraved. Victorian stamp on slit accessory. Also simple trial frame, all metal with half eyes with no scales, C bridge and straight sides with spatula ends.


1999.2737

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