Archive of Collections



Details and Image



Item#TypeModelType No.Version No.MakerCountryMaterialScale LengthDateCondition
LAW009Linear
10-C
Engraver's and Photographer's Proportion Calc.
1
LawrenceUSABoxwood 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.

Click on the Condition Code to obtain more details.