Sears 728.58850 Handheld Electronic Calculator

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Sears 728.58850 Handheld Electronic Calculator with Instructions
Sears 728.58850 Handheld Electronic Calculator
Sears 728.58850 Handheld Electronic Calculator with Instructions and Case
Sears 728.58850 Handheld Electronic Calculator, Back View

Object Details

maker

Sears, Roebuck and Co.

Description

This is a relatively early Sears handheld electronic calculator, manufactured by Bowmar/Ali.

The calculator has a black plastic case with a plastic display window and seventeen square plastic keys with circular tops (actually two keys are rectangular bars). These include nine digit keys, zero and decimal point bars, four arithmetic function keys, a clear entry key, and a clear key. A constant switch is left of the two topmost keys and an on/off switch is to the right of them. Behind the keyboard is a red eight-digit LED display. A mark at the top reads: Sears.

A jack for a power adapter is on the right side. This example lacks an adapter.

An "OPERATING OUTLINE" in raised characters on the back of the case gives instructions. A tag at the bottom reads in part: IN ALL CORRESPONDENCE REGARDING THIS ARTICLE ALWAYS MENTION (/) MODEL (/) NUMBER 728.58850 SERIAL (/) NUMBER 251587. It also reads: Made in U.S.A. Four screws hold the back of the case to the front.

The calculator has a zippered plastic case with a belt loop at the top. Marks on the case read: Sears and: MADE IN (/) U.S.A. The case also contains a paper instruction manual.

Compare 1986.0988.204 (the Bowmar 905 from 1972). Also compare 1986.0988.362, a Sears 728.58863.

Reference:

Guy Ball and Bruce Flamm, The Complete Collector’s Guide to Pocket Calculators, Tustin, CA: Wilson/Barnett Printing, 1997, pp. 35–36, 136.

Location

Currently not on view

Credit Line

Gift of John B. Priser

date made

ca 1973

ID Number

1986.0988.361

catalog number

1986.0988.361

accession number

1986.0988

Object Name

electronic calculator

Physical Description

plastic (case; keys; display cover; carrying case material)

metal (circuitry; zipper on case material)

paper (instruction manual material)

Measurements

overall: 1 3/8 in x 3 in x 5 3/4 in; 3.4925 cm x 7.62 cm x 14.605 cm

place made

United States

See more items in

Medicine and Science: Computers

Computers & Business Machines

Handheld Electronic Calculators

Data Source

National Museum of American History

Metadata Usage

CC0

Link to Original Record

https://n2t.net/ark:/65665/ng49ca746ad-00f5-704b-e053-15f76fa0b4fa

Record ID

nmah_1364148