This adapter couples a Pentax K-mount camera to a Tak FS-102 or FS-128. It's part # 33 on your system chart. Fits any K-mount Pentax camera; I used it on my Pentax K-1000 and also my SF-1. Condition is excellent, it just shows a very small amount of wear. I only used it a few times and decided to go with Olympus for prime focus. This is $56 plus shipping new, I'm asking $42 and will include shipping. Return it within 7 days if not satisfied and I'll refund your $, less shipping.
NOTE: this *might* fit a FSQ-106, but check that if that's what you want this for.