Hi, There is a lot with IBM circuit boards on http://goldrefiningforum.com/phpBB3/viewtopic.php?f=58&t=18960 I don't know if there is any value for collectors but I thought I would pass it along. It isn't my cards but if I manage to broker a deal I get a kickback... remember mention me if you buy the collection. :-D Date codes I see on the IC:s range between 1974 and 1982. G?ran