Early
Electronic
Calculator		 Sears 728.58821 Calculator

Manufacturer: Sears
Model: 728.58821
Year: 1973
Form: Pocket
Functions: Basic four
Number of Digits: 8
Display Type: LED
Logic Technology: LSI
Diodes: 8
Transistors: 5
IC Complement:Western Digital LC1552B
ITT B6248 (2)
ITT B6249 (2)
(5 total)
Batteries: 3 AA
Power Connector:4.5 VDC, - tip, DC
Tech. Data Level: 2
Tech. Data Source: RE
Tech. Data Pages: 1
Tech. Data:Schematic (pdf)

Another model actually OEM'd by Bowmar, in this instance for Sears.

 

- Unit Log -

Serial Number: 210555
Year of Manufacture: 1973 (LC1552 IC stamped with 7341, others ICs with 7339, 7343.)
Date of Receipt: 2020 Mar 04
Source: ebay Nanaimo
State upon Receipt: Good physical condition, minor scuff marks on top. Functional.
Current State: Fully functional (2020 Mar).

Date: 2020 Mar
Procedure: Cleaned.


  Sears 728.58821
Calculators | Integrated Circuits | Displays | Simulations
EEC 		bhilpert