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Evans Optometric Rule / measuring scale
OPTOMETRIC INSTRUMENTS
rule
London Optical Co
Europe: United Kingdom
1940-1949
wood
1999.3036
OPTOMETRIC INSTRUMENTS
rule
London Optical Co
Europe: United Kingdom
1940-1949
wood
Long wooden rule with one V-shaped end. (V broken). Obverse features A.C. (accommodation) scale from 18 to 1.5 and A.M.P. (amplitude) scale from 6 to 66. Inscribed on reverse.
1999.3036