|Re: HP 45 versions|
Message #14 Posted by Jeff O. on 10 Apr 2012, 10:47 a.m.,
in response to message #13 by Michael de Estrada
That's interesting. I was wondering if there were any date codes beyond 1350. It seemed there must be, as the 45 was not officially discontinued until 1976 according to "A Guide to HP Handheld Calculators and Computers" by W. A. C. Mier-Jedrzejowicz. I wish the museum’s list of serial numbers included latest in addition to earliest. In any case, this means there are now at least five physical versions of the 45:
Version 1 - Metal strip below display and front label says Hewlett Packard only.
Version 2 - Metal strip below display and front label says Hewlett Packard 45.
Version 3 - Painted silver strip instead of metal strip.
Version 4 - Painted OFF and ON legends replaced with raised molded unpainted OFF and ON
legends and the serial number still in the battery compartment.
Version 5 - raised molded unpainted OFF and ON legends and the serial number has been moved
outside the battery compartment and located below the large label between the two bottom feet.
There may be more, depending on when the switch between the two versions of STO arithmetic occurred.
I just pulled out a rather gnarly HP-65 that I have in my desk (gnarly because it appears to have been forcibly removed from a security cradle), and sure enough, the S/N (1512A) sticker is between the feet.