Keeb ID

[diazel]

A friend found these keyboards in a free box at a local yard sale. The one on the right is a Keytronic. The one on the left...?

Made in Germany
Has a label on membrane with year 1994
Appears to be something like a BTC slider?
No escape key
Appears to have PS2
Unix layout
A spacebar that seems as long as the entire alpha block
Stepped keys for all the modifiers but not for the numpad large keys
Insert and delete at the bottom of the numpad where you'd expect to find a zero and decimal point.

https://imgur.com/gallery/spaqR5c

Any thoughts?

[Tactile]

The ESC key is at the top left corner of the numpad. Most UNIX boards have a Compose key somewhere & I don't see one here. I don't think it's a UNIX board.

[yui]

to me very large space bars and strange layouts screams mainframe terminal type computers or other special use machines like trading, interesting find either way