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MANUFACTURING AND DISPENSING EQUIPMENT
Europe: United Kingdom
Mid 20th c.
overall: 60 mm x 50 mm x 9 mm
Lens measure. White metal with milled edge. Three prongs. Positive and negative 0-20 scales. Blued steel pointer. Plastic-glazed cover.
Transferred from the former Museum and Library of Optometry, Aston University / Gift of the family of the late Anthony G. Sabell FCOptom, 2016