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Details and Image
Item#
Type
Model
Type No.
Version No.
Maker
Country
Material
Scale Length
Date
Condition
LAW009
Linear
10-C
Engraver's and Photographer's Proportion Calc.
1
Lawrence
USA
Boxwood w/white painted surface and printed scales
"10"
c. 1936
C4
Notes:
Slide rule for calculating area % and size % based on original and copy size for up & down scaling.
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Condition Code
to obtain more details.
