Name
Keuffel & Esser < 4097 C > Ever - There, 1936 (Old 4098)
Front Scales
A = B CI C = D K
Back Scales
= S L T =
Type of Rule
slide rule
Material
Engine Divided White Xylonite
Dimension (mm)
153x33x3.5
Area of Use
generic
Origin of Rule
Michael O'Leary
Match Number
4373
Comment
Thumbnail