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Focal gauge
MANUFACTURING AND DISPENSING EQUIPMENT
focal gauge
Norville Optical Co Ltd
Europe: United Kingdom, England, Gloucestershire, Gloucester
1978
plastic
overall: 75 x 22 mm; overall (case): 20 mm x 80 mm x 97 mm

Set of focal gauges/segment height indicators. Clear plastic with sprung white plastic sliders. Scale marked in white, 3-39. Contained in brown snap case lined in yellow velvet.


2000.128

Gift of Mrs E. M. Blackburn, 2000


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