Unfortunately, my PET comes without a keyboard. I managed to buy a keyboard with bright keys, which I think comes from 8296-SK. It has a skewed key number ‘9’ because of a badly repaired key pod.
This keyboard is marked Mitsumi COM-8. Other markings are: 56-0226A, TW-1594HB, KSR-A73YY.
Please compare to Mitsumi COM-3 keyboard from 8032-SK.
Case with key pods