Early
Electronic
Calculator		 apf Mark 40 Calculator

Manufacturer: apf
Model: Mark 40
Year: 1975
Form: Pocket
Functions: Basic four, constant, %
Number of Digits: 8
Display Type: LED
Logic Technology: LSI
IC Complement:Mostek MK50282 N
Toshiba T1347
Batteries: 9V
Power Connector:9 VDC, + tip, sub-mini audio
Tech. Data Level: 2
Tech. Data Source: RE
Tech. Data Pages: 1
Tech. Data:Schematic (pdf)

- Unit Log -

Serial Number: M-165620
Year of Manufacture: 1975 (IC stamped with 7538, display stamped with 7536)
Accessories: With box and manual.
Date of Receipt: 29 Apr 2000
Source: Burnaby/Hastings flea market.
State upon Receipt: Excellent physical condition. Appears to be NIB or rarely used. Fully functional.
Current State: Fully functional (29 Apr 2000).

- Unit Log -

Serial Number: M-0326843
Year of Manufacture: 1975 (MK50282 IC stamped with 7551, T1347 with 5·I)
Accessories: With manual.
Date of Receipt: 19 Jun 2001
Source: Surrey second-hand store.
State upon Receipt: Excellent physical condition. Fully functional.
Current State: Fully functional (21 Jun 2001).

Date: 21 Jun 2001
Procedure: Cleaned.


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