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Orthops Rule
OPTOMETRIC INSTRUMENTS
rule
Raphael's Ltd
Europe: United Kingdom, England, London
20th c.
bone
1999.87
OPTOMETRIC INSTRUMENTS
rule
Raphael's Ltd
Europe: United Kingdom, England, London
20th c.
bone
Ivorine frame-measuring rule. Printed both sides, featuring several scales. Fixed projection for taking height and projection of bridge. Series of cut-out curves for assessing shape and size of bridge.
1999.87
Gift