HP 70 and 80 calculator???


What does the forum make of this strange looking HP 80 I recently purchased? You can view the eBay listing I bought it from at: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=170149889457&ssPageName=STRK:MEWN:IT&ih=007. Thanks for your opinions. Strange, rare or practical joke????


Somebody had parts to two calcs and combined them into one..... Maybe there is a mathematical exercise of how many different possible combinations there may be???


I would guess that the calculator is an HP80 since the nomenclature on the face most closely fits that model. You could try the button in the lower right to see what the electronics are.

PI  -> HP35
0 -> HP70
1 -> HP45 or HP80
R/S -> HP 55,65, or 67 (not likely)

The Franken-calc CLX and STO keys are probably from a HP-35, while the six orange keys are obviously from a HP-70.


NOTE: This is not a copy of the picture, but a direct link to http://members.chello.cz/eckstein/hp870-1.jpg

Edited: 9 Oct 2007, 1:08 p.m.

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