Great work! So I guess it's this CDC Omega / 480 Model III, as described in this March 1979 Computerworld? https://imgur.com/a/8TKIqNN https://imgur.com/a/8TKI

Great work! So I guess it's this CDC Omega / 480 Model III, as described in this March 1979 Computerworld? https://imgur.com/a/8TKIqNN https://imgur.com/a/8TKIqNN (edit: and here's a manual I found for the Model I. Does indeed sound like a System/360 compatible. http://www.bitsavers.org/pdf/cdc/omega480/22291359A_OMEGA_480_Functional_Characteristics_May77.pdf http://www.bitsavers.org/pdf/cdc/omega480/22291359A_OMEGA_48...)