Looking for info on Calcomp Sanders box

I picked up one of these CALCOMP SANDERS Model: 4518TW System: 89953 Serial: X106944 Looks like a CAD machine but has only a floppy and apparently not HD. Could it be just a graphic terminal that connects to an IBM mainframe using 3270 for applications like CADAM and KATIA? You can see a picture of it at http://www.naida.org/calcomp/calcomp.jpg e. ======================================================================== Enrico Badella email: enrico.badella(a)softstar.it Soft*Star srl eb(a)vax.cnuce.cnr.it InterNetworking Specialists tel: +39-011-746092 Via Camburzano 9 fax: +39-011-746487 10143 Torino, Italy Wanted, for hobbist use, any type of PDP and microVAX hardware,software, manuals,schematics,etc. and DEC-10 docs or manuals ==========================================================================