Unusual HP-80

[Didier Lachieze]

(08-21-2015 03:38 AM)John R Wrote:  I have included two photos of the battery compartment (including contacts) below. This HP-80 does not have the "split battery compartment" characteristic of the early HP-35. May I ask what other distinguishing features you might be looking for there?

Thanks. I was looking for the “split battery compartment” and also for the black clip on the adapter pins which both are present on the early 35s. But they are not on your HP-80, so I think now that the serial number label is not significant to determine the build date as proved also by the unit from Michael.