Pertec 310348669864 MPI 310349702429 Ampex 310349706855 something called a xenotron II with horrible screen rash 310349704482 (listed as xentron, which is a totall different operation) Might be something related to this listing: (from a google search from another list) http://users.monash.edu.au/~ralphk/xvc2-xenotron.html