Hand-held Calculators

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"Standard Type 1" Calculators

By the mid 1970s the components for calculators were mass-produced and basic calculators had become very cheap.  This model was one of the cheapest and was sold under many names.  It was even given away as an advertising item.

Below are photographs of a few of the many versions of this "Standard Type 1" calculator.

"Standard Type 1"

Distinctive features: A popular, low-cost model, sold under many names.

Technical details:
Display is 8 digits, red LED.

Four function, %, memory.

Integrated circuit - Texas Instruments TMC0972 or TMS0972.

9v (PP3 battery).

69 x 133 x 24 mm (2.75" x 5.25" x 0.95").

Made in Hong Kong.

King Sonic

King Sonic - a typical "Standard Type 1" calculator.

Inside

Showing the electronics of this type of calculator.  By now there is a just a cheap keyboard, the Texas Instruments TMS0972NL integrated circuit (here date coded to early 1978) and the 8-digit LED display array.

Some Varieties of "Standard Type 1" Calculator

Bohsei 3000
Bowmar
Geeta 3000

Bohsei 3000
Photo courtesy of Gene Sederholm.

Bowmar (no model number).

Geeta 3000

Goodyear G191

Goodyear G191
A calculator advertising Goodyear tyres - by now calculators were cheap enough to be given away as promotional items.

Mustang 3000

Mustang 3000

Texet 800M

Texet 800M

Ventora

Ventora

Hand-held Calculators

Vintage Calculators

© Text & photographs copyright Nigel Tout   2000-2017  except where noted otherwise.