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Details and Image
Type
Model No.
Maker
Country
Construction
Material
Date
Scale Length
Area of Use
Linear
Keuffel & Esser / 4088-2
Keuffel & Essor
USA
Plastic over wood
1915-1922
10 cm
Engineering
Notes:
"The K&E 4088 Polyphase Duplex slide rule, in various lengths, was made from 1913 until 1939. This is the 4088-2, or 8-inch version, and was made sometime between 1915 and 1922, based on the cursor type and the lack of a B scale. "
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