First up, later style 122 keyboard assembly [in this example
1397003 PS/2 terminal emulator] in an older style case [from a
1389260 for 3179/3180 terminals].
Fits in quite neatly.
Yes, this works quite well.
Now for the older style keyboard assembly in the newer case.
It extends over the sides, and the height is never going to work...
Sure enough, not a good fit.
But what about the 104 key case [
1387033 for the 3290 terminal]? How different is it to the older 122 style?
It feels as though it would fit well if the right hand side of the 'board was "adjusted" suitably:
...and accordingly so vice-versa:
The newer style case really doesn't work with the old 104 assembly though: