Archive
of
Collections
Details and Image
Type
Model No.
Maker
Country
Construction
Material
Date
Scale Length
Area of Use
Linear
Time Slide
Keuffel & Esser
USA
Wood
25 cm
Fractions of a Year
Notes:
Missing a cursor. I have never seen this rule in any online collection. It is so cheaply made that apparently no on bothers to collect it.
Image 1
Image 2
