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'Perfection' trial frame
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial frame
American Optical Company
c.1930
metal; shell
2000.40
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial frame
American Optical Company
c.1930
metal; shell
Trial frame. White metal. Adjustable sides, bridge height and p.d. Round eyes with white bakelite external half scales. Double lens clip in front of eye and single lens clip behind. Adjusting wheels at joints. Drop end sides with riveted shell covers on ends.
2000.40
College Purchase, 2000