A friend noticed my Math Pacs had different HP Part Numbers. I Have all four versions. I assume there are minor software differences, but I have not taken the time to verify. The first line is how they CATalog 2 on an HP-41. The second line is the white-ink HP Part Number on the module. The last line is the date code stamped into the module case.
MATH 1A
HP 00041-15003
Date Code 1953
MATH 1B
HP 00041-14023
Date Code 2134
MATH 1C
HP 5061-5261
Date Code 8535
-MATH 1D
HP 5061-7287
Date Code 8939
Interesting notes:
MATH 1B does not show up in a CAT 2 on a 41CX Machine, the other three do. Why?
-MATH 1D is part of the MATH/STAT Module and also has -STAT 1B included in the module.
The date code on the MATH 1A, 1953, would mean 1979 Week 53. Dec 31 1979 was a Monday. Was it made on that Monday only?
HP-41 Math Pac Part Numbers and such
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