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TRIAL CASES, FRAMES AND REFRACTOR HEADS
prism trial case
Clement Clarke Ltd
Europe: United Kingdom, England, London
Mid-late 20th c.
metal; (case): wood; leather; velvet; silk
case: 40 mm x 178 mm x 72 mm; overall: 38 mm x 149 mm
Set of five rimless trial prisms. With specialist wire metal trial frame with wrap-round eye rims and bowed straight sides. Contained in black skin-covered hinged wooden case lined with purple silk and velvet.
Gift of Mrs Sue Wilford, FCOptom, 2010