I have one really odd II+ with words printed below each letter on each
key. R has RUN printed below it, P has PRINT, S has SAVE, L has LOAD, B
has BLOAD etc. You activate each word with a function key occupying the
'missing key' space on the keyboard layout and it would save a ton of time
typing these words, if you are programming the II+. The slots on the back
of the case are barely big enough for ribbon cables to emerge and there are
a number of eproms on the motherboards.
That's definitely a clone. The "macro" keyboards were a common
substitution.