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trial case
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial case
Negretti & Zambra
Europe: United Kingdom
c.1880
wood

Wooden trial case. Hinged (hinges broken) with two hook clasps and keyhole. White plate on top of lid. Red velvet lining with red and white piping. Leather metric labels with gold lettering. (Dioptres). Lenses rimless. Contains 41 concave lenses. 43 convex lenses. 11 prisms. Also six rectangular purple glass strips. Simple drop cell trial frame with front made from single piece of steel metal, straight sides with spatula ends and sprung clips to hold lenses in place. Snellen Test Types card, manufacturer's note on repair and replacement. Handwritten size conversion chart.


1999.3545

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