Calculator Boards

Any thread on this yet? If so, I cant find it.

What grade of boards do you think most T.I calculatos have? What about other scientific calcs?

Take a look here:

http://www.instructables.com/id/Ti-8...c-Disassembly/

Looks like at least #3 Motherboard/Motherboard/Peripheral depending on the buyer. Kind of hard to tell if the button contacts are gold from the picture. If you had a bunch you might get a bit higher grade out of them.

If you come across a calculator called:
Busicom 141-PF

Treat if very nicely.....
Busicom was a Japanese company that owned the rights to the first microprocessor, the Intel 4004, which they created in partnership with Intel in 1970.
http://www.vintagecalculators.com/ht...om_141-pf.html

This is probably well known here, but just in case:
An Intel C4004 microprocessor goes for several hundred dollars for a single chip. It's one of the most valuable microprocessors out there.
http://www.computermuseum.li/Testpag...l4004-1969.htm

Here's a recent auction for a C4004 clone ($112 for a single chip).
http://www.ebay.com/itm/ws/eBayISAPI...=250992403163+

Some of the most collectible early ICs are in vintage calculators from the 70s.