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Improved Moswheel trial frame
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial frame
Europe: United Kingdom
Early 20th c.
metal
eye: 33 mm
2017.449
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial frame
Europe: United Kingdom
Early 20th c.
metal
eye: 33 mm
Triple drop-cell trial frame. Metal frame with two semi-circular front cells and one rear to each fully round eye and semi-circular engraved white-on-black metal protractor scales. Capacity six lenses. Each lower rim with an inclined wheel for lens rotation. Narrow K-bridge. Thin straight sides with oval loops at ends.
2017.449
Gift of Mr John Dixon Salt FCOptom, 2017