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Trial Frame
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial frame
Mid 20th c.
metal; plastic

Trial frame. White metal. Adjustable bridge height and p.d. Round eyes with white plastic internal scales. Double lens clip in front of eye and single lens clip behind. Adjusting cog wheels at joints. Detachable extending sides with black plastic end covers.


2007.253

Gift of Mrs Elizabeth Rickards, 2007



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thumbnail trial frame
c.1920
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