Early Electronic Calculator Pocket Calculator Photo Gallery

Commodore C110 1972 Logic Technology: LSI Display: LED A classic example of one of Bowmar's early models. Bowmar OEM'd models for many name brands and retailers. Special circuitry implements a battery-saver timer that blanks the display after 15-20 seconds of idle. A solitary segment (g) of the middle digit is left illuminated to indicate the unit is on. Pressing any key brings the display back, the "D" key is included to bring the display back without effecting any other operation.

LogicData TA-9 1972 Logic Technology: LSI-2 Display: VFI An early American-made pocket calculator. The model is based around an unidentified two-IC LSI chipset (the ICs were originally labeled but were not discernible when received). Sadly, one or both of the ICs in this unit seem to have failed, and the unit is not functional. Too bad, as it is an early and rare model. The unit came with a promotional brochure from Standard Oil. See the family gathered around the kitchen table looking with excitement at the amazing calculator. Yours for only $8.50 a month for 12 months on your Standard Oil credit card.

Royal Digital V 1972 Logic Technology: LSI Display: VFM

Digimatic P8 (Model No. 41031) 1973 Logic Technology: LSI Display: LED Another model actually OEM'd by Bowmar, in this instance for Sears. Digimatic was a name brand of Sears.

Hewlett-Packard 80 1973 Logic Technology: LSI Display: LED The HP-80 is at root the HP-35 reprogrammed with some business functions. Note the ENTER key has been relabelled as SAVE, although it's still a 4-level RPN calculator. The display will flip into scientific mode for large values but there is no Enter-Exponent key.

Sanyo ICC-83 (SACOM MINI) 1973 Logic Technology: LSI Display: GDM

Sears 728.58821 1973 Logic Technology: LSI Display: LED Another model actually OEM'd by Bowmar, in this instance for Sears.

XONEX ELSI III / DATAEXAC 1973 Logic Technology: LSI Display: VFI

Digimatic D8 (Model No. 41024) 1974 Logic Technology: LSI Display: LED Another Digimatic model made for Sears by Bowmar.

Keystone 395 / exponent 1 1974 Logic Technology: LSI Display: PPX2 The Keystone calculators are quite rare in their use of gas-discharge displays in a pocket calculator.

Keystone 2050 1974 Logic Technology: LSI Display: PPX2 A rather rare early scientific pocket calculator. Unfortunately, this unit is non-functional, seems to be a non-repairable fault with the calculator chip.

Lloyd's Accumatic 55 1974 Logic Technology: LSI Display: VFM