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Details and Image

TypeModel No.MakerCountryConstruction
DateScale LengthArea of Use
no model number
Pickett & EckelUSA
194525 cmUnknown

Notes: "Pickett & Eckel ""Deci.Point"" slide rule. The front of this rule has double-expanded and triple-expanded C-type scales; the back seems focused on decimal points; but: I do not understand how this rule is supposed to be used.."

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