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Kirbro rule
OPTOMETRIC INSTRUMENTS
rule
Kirk Brothers
Europe: United Kingdom, England, London WC1
c.1930s
boxwood
overall: 48 mm x 201 mm x 4 mm

Boxwood rule with one curved end and two fenestrations. P.D. scale and radii curves along one edge.


1999.4143

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1999.4143b.jpg

1999.4143a.jpg

1999.4143.jpg

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