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trial frame
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial frame
20th c.
metal; plastic
1999.3294
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial frame
20th c.
metal; plastic
Triple cell trial frame. Shiny white and black metal. Round eyes with fully revolvable metal scales. Turning wheel adjusting. Bridge adjustable via turning knobs for P.D. Long sprung plaquets with peach-coloured pads. Sliding sides with sprung joints and drop ends with black plastic covers.
1999.3294