Four pocket calculators

1. Sears-8 (728.58862) LED pocket calculator
Manufacturer: Sears
Original Price: $80
Original Date: 1974
2. Unisonic 1540L LED pocket calculator
Manufacturer: Unisonic
Original Price: (?)
Original Date: c.1976
3. TI 2550 LED pocket calculator
Manufacturer: Texas Instruments
Original Price: $100
Original Date: 1974
4. TI-1270 LED pocket calculator
Manufacturer: Texas Instruments
Original Price: $13
Original Date: 1976

left to right: 1, 2, 3, 4

Photo of four calculators as listed


Sorry, but I no longer collect these items
and do not have further information.

Mind Machine Museum Home Page

Group Photo (approx. 50k in size) of 45 artifacts

List of artifacts in the 50k Group Photo


H. Layer Home Page made-with-Macintosh logo

Copyright © 1996, H.A.Layer, all rights reserved, updated 2001