On Thu, 2025-09-04 at 11:35 +0100, David Wade via cctalk wrote: > > I'm looking for some information on a couple of the early > > IBM unit record devices, in particular the Type 512A and > > the Type 518. Ideally, I'd like to get the mechanical > > dimensions in enough detail to create a CAD model. > > As I assume you are aware, but perhaps others on here are not, that > these pre-date computing and must come from the era when data > processing > involved only punched cards and I feel well before the term "Unit > Record" was coined. Sadly, this seems to be a forgotten era and there > is > very little information about it on the web.
The Computer History Museum in Mountain View, CA has a 519. They might have other models as well, or information about them. Contact Dag Spicer <[email protected]>. Haus zur Geschichte der IBM Datenvararbeitung (House of the History of IBM Data Processing) had a large collection in what had been a punch- card factory in Sindelfingen, a suburb of Stuttgart. They had a 650, 1401, and 360\25 in working order. IBM sold the building and moved the collection to the IBM technology center across the autobahn in Böblingen. I don't know how much of the collection they retained. Contact Hans Spengler <[email protected]>, Werner Seebode <[email protected]>, or Heinz Oberle <[email protected]>.
