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Hello All,
I have just come across a zoom lens "Ricoh Rikenon P Zoom 28-110mm f/2.8-3.8".
This is a fairly fast zoom with a wide range. Unfortunately, I have not been able to find any reference to it. The seller has pictures at the below address and claims that this is a K-mount manual lens (the pictures are compatible with his view). Apparently, it has never been used and was on display at a (now closing) shop.

What is this?

(The site is in Turkish).

(You may need to copy&paste the link and remove a space, if there appears any).

PENTAX DÝJÝTAL VE MANUEL ÝÇÝN 28-110F2.8 RÝCOH, #7592041 Gittigidiyor.com