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Trial Frame
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial frame
Europe: United Kingdom
1930s
metal; celluloid
overall: 145 mm

Trial frame. White metal (somewhat rusted). Two round eyes suspended from flat browbar adjustable for p.d. by milled control wheels at either end. Metal nose rest adjustable for height and horizontal distance, with two attached celluloid scales. Extending flat-section curl sides. White semi-circular celluloid scales to upper and outer edges. Rotating double lens clip in front of each eye, controlled by a milled wheel to the side, and single lens clip behind each eye.


2017.627

Transferred from the former Museum and Library of Optometry, Aston University / Gift of the family of the late Anthony G. Sabell FCOptom, 2016



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