Jos, Did you try the cvml ? Ruud Baltissen has scanned a lot of Elektuurs and Radio Bulletins from that period , may you can find a reference there . -Rik -----Original Message----- From: "Jos Dreesen" <jdr_use at bluewin.ch> To: cctalk at classiccmp.org Sent: 08/11/2009 19:39 Subject: Question for the Dutch collectors... I remember quit well reading, around 1977, a booklet from around 1973, I believe by Kluwer, describing a DIY computer build around the Siemens/Philips FDxnnn series of TTL chips. Memory was a philips corestack-module, something like 1K or 2K x 12 or x16. Of course there was no way of me building that in 1977, but now.... Does this ring a bell with anyone ? Jos