Looks like someone mistaking a Takumar bayonet for the SMC Pentax. On the other hand he seems to be buying Pentax lenses so maybe it's not a mistake.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3001251223&category=4688 Outside of a dog, a book is man's best friend. Inside of a dog, it's too dark to read. --Groucho Marx