Trial Case (Bifocal Segments)

Catalogue Number: 1994
Trial Case (Bifocal Segments)
Category: Equipment
Sub-Category: Trial lens case
Year Of Publication/Manufacture: c1910
Time Period: 1900 to 1939
Description Of Item: Small wooden trial case covered in black leatherette with hinged lid & hook clasp. Brown velvet lining to lid. Contains 12 pairs of cement bifocal lenses, Adds +0.75 to +3.50. Each 37mm rim (nickel alloy) holds a flat plano glass lens onto which is cemented a 15mm bifocal segment. Dimensions: W:13.8cm x D:10.5cm x H:5.2cm.
How Acquired: Not known
Condition: Lenses: very good, Case:fair
Location: Archive office. East wall shelves unit 2

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