No actually it does not surprise me, there where two versions of the Sears SLII. The first being the Nikkorex F, Ricoh Singlex, Sears SL11 triplets with Nikon F bayonet mount. The second Sears SLII was said to be a meterless Ricoh Singlex TLS body. I also read somewhere that the Ricoh Singlex had an M-42 mount variant, however since I have not owned any of the cameras listed (with the exception of the Chinion CS and Pentax H2) I am going soly on what I have read. That said it is possible that there may be flaws in the information. Feel free to help me clear that up.