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trial frame
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial frame
20th c.
metal

Trial frame. White metal. Two-part cylindrical browbar, adjustable for PD and nasal height via screwthread wheel. Metal nose rest. Centre joints. Flexible flat-section sides, bowed at ends. Round eyes featuring double drop cell at front, with flat-bottomed protractor scale, and single drop cell behind.


2004.643

Gift of Mr Brian Mitchell, FBDO, 2004



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