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Maddox Bi-Prism
TRIAL CASES, FRAMES AND REFRACTOR HEADS
prism
Europe: United Kingdom
Mid 20th c.
metal; glass; vulcanite
overall: 51 mm x 38 mm; prism: 15 mm

Bi-prism disc for use in a trial set. White metal frame and handle, with dark brown inset vulcanite margin and round aperture containing a base-to-base prism.


2017.456

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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