Corvus 625 (First design)

Date of introduction:  1975 Display technology:  LED-stick
New price:   Display size:  8
Size:  5.6" x 2.8" x 1.3"
 142 x 72 x 33 mm3
Weight:  4.9 ounces, 140 grams Serial No:  257075
Batteries:  3*AA cells Date of manufacture:  mth 05 year 1975
AC-Adapter:  4.5V DC, 80mA Origin of manufacture:  Hong Kong
Precision:  8 Integrated circuits:  Mostek MK50311N
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

This Corvus Model 625 combines the housing of the scientific Corvus 500 calculator with the functionality of the Corvus 615.
While the Corvus 615 sports a vacuum fluorescent display (VFD) manufactured by Itron, uses this Corvus 625 a light emitting diode (LED) display from Hewlett Packard.

Fellow collectors: We noticed Corvus 615 calculators with both VFD and LED displays and even a Corvus 625 with a green VFD was recently reported. If you own either a Corvus 615 or 625 calculator, please drop us a line with its serial number and display technology. Thanks!

Other calculators sold under the Corvus brand are the 310, 320, 400, and 415 models. Don't miss the colorful Corvus 804.

Learn more about Mostek Calculator Integrated Circuits.

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If you have additions to the above article please email:

Joerg Woerner, November 6, 2010. No reprints without written permission.