This core plane appears to be from a Univac Scientific computer, i.e., the 1103A, made from 1956 to ca. 1960. It's a dead ringer for a photo in a 1958 brochure on the machine. The 1103A was an upgrade to the orginal 1103 from 1953, replacing the Williams tube memory with core among other improvements. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=250501299145 --Bill