John writes, >> Purchased directly from Steve Wozniak by the consignor in Autumn 1972 > > This seems strange to me > Looking at the chips, I see > 1820-0054 ; 7304 > 9316 DC ; F 7403 > 9390/7490 ; PCF 7422 > > The numbers on the first row are valid IC part numbers. > > The numbers on the second row look like year+week date codes in 1973 and 1974 > which indicate to me that the device was not sold pre-assembled in 1972. > .. > On Fri, 30 Oct 2020 at 12:18, Stephen Loosley > <[email protected]<mailto:[email protected]>> wrote: > > Bonhams Auction https://www.bonhams.com/auctions/26078/lot/62/
Good detective work John. It does make sense that they are the manufacturing dates. Haha, wonder if Bonhams, as a supposedly reputable auction house, are aware of this? Cheers, Stephen _______________________________________________ Link mailing list [email protected] http://mailman.anu.edu.au/mailman/listinfo/link
