Right off the bat, despite the fact there is no branding anywhere, I'm confident this was made for Triumph Adler (or Olivetti, as they were jointly owned at the time). I say this due to the colour scheme and also due to the "CSC", which can be seen on other Triumph Adler keyboards [see here for one example].
The part I'm unsure about is: what place did this keyboard have in their lineup? I have to assume, based on datecodes, that this was the predecessor to the G81-3011HAD.
Onto the keyboard itself, it's an odd one. Cherry's incredibly rare 3000 prism-style casing, and a colour-scheme somewhere in between Olivetti's and TA's as shown in the last photo. That combined with a standard colour LED sticker, unlike both TA and Olivetti's keyboards.
