The Contact Systems CS-400C was the keyboard to a component locator machine with automatic cut an clinch, produced from 1988 through 1992.
My keyboard was dated 11-28-88.
The keyboard has Futaba complicated linears and a single Futaba linear locking switch for the Shift Lock.
Another shot from above:
The keyboard uses an Intel 8031A-P controller, and has a EPROM, which can be erased with UV light. The ROM chip appears to have been last updated 11-30-88, 2 days after the keyboard was manufactured.
The caps are very similar in height to row 3 SA caps, though slightly shorter, and a bit more square on top. They have a nice iron cross mount on the underside and are very thick doubleshot ABS.
Comparison to SA Caps: