Corvus 307

Date of introduction:  1974 Display technology:  Panaplex II
New price:   Display size:  10
Size:  8.5" x 6.5" x 2.2"    
Weight:  1 pound 7 ounces Serial No:  307-118386
Batteries:   Date of manufacture:  mth 4 year 1975
AC-Adapter:  115 V Origin of manufacture:  USA
Precision:  8 Integrated circuits:  Mostek MK50203N
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

Corvus, the consumer division of the famous IC manufacturer MOSTEK, introduced with the Model 300E their first desktop four-function calculator. This late Model 307 replaces the unusual square-root function with a more common 4-key memory.

The Model 307 makes use of the MOSTEK MK50203N calculator circuit known from the Model 415 but misses the 1/x key. Learn more about Mostek Calculator Integrated Circuits.

Three different desktop calculators were available from Corvus:

Model 300E: Unusual desktop calculator with square-root function
Model 305: Added full clock function to the 300E
Model 307: Added 4-key memory instead the square-root function

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If you have additions to the above article please email:

Joerg Woerner, March 23, 2003. No reprints without written permission.