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Syze rule
MANUFACTURING AND DISPENSING EQUIPMENT
slide rule
Raphael's Ltd
Europe: United Kingdom
1930s?
wood; metal
overall: 19 x 181 x 43 mm

Slide rule comprising two pieces of wood screwed together and with two metal clips, one on the end of the sliding central section. Various pupillary distance scales dependent upon shape and size of lens with particular reference to 'Fits U' frame fittings.


2003.308

Ex Keeler Collection



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