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Alco Personal Calculator or Alco Four-Rule Personal Calculator

L.E. Jones

A 5″ metal slide rule. The material seems to be common sheet metal which is shiny on the inside but has a gray matte surface for the scales. It is a closed frame slide rule incorporating a mechanical calculator for addition and subtraction to six significant figures on the back surface. A stylus for the addition and subtraction functions is provided and can be attached to the side. Scales: The back surface of the slide rule has inch and centimeter measuring scales. The scales, which are all folded are A, B, C1, C and D.

Accession Number: 2010.lej.22

Alternative Name:

Primary Materials: Metal

Markings: Old Inventory Number = 22.

Dimensions (cm): Height = .9, Width = 4.2, Length = 16.2

Function: For facilitating calculations.

Condition: Item is in very good condition.

Associated Instruments:

Manufacturer: Alco, Japan

Date of Manufacture: c. 1920-1970


Additional Information and References:

Historical Notes: