This is the mainframe for a Sony BVE-910 editing system. This is a 4 machine system with 2 AUX sources for a total of 6.
Here are the primary specs:
Four VTRs in A/B Roll editing
Two Aux sources
Switcher interface: serial or parallel: Fader, Wipe,etc. Can store panel settings for a variety of Sony and Grass Valley switchers
Four channel audio control
List management facility
Optional Floppy drive unit
Any combination of LTC, VITC & CTL editing
DIscontinuous TC editing
Dynamic Motion control
NTSC Color frame editing
Cue tone record or playback
Much more....