Archive
of
Collections
Details and Image
Type
Model No.
Maker
Country
Construction
Material
Date
Scale Length
Area of Use
Linear
4181-1 (v2)
Keuffel @ Esser Co.
USA
Plastic
c. 1947
12.5 cm
Engineering
Notes:
Log Log Duplex Decitrig Plastic
Image 1
Image 2
