As I wrote in my introduction thread, I've got my hands on an old camera. I'm guessing it was made in the late 60's, that is atleast what the design, wear and tear tells me. Now, I don't know a lot about this camera, but it has been in the family for quite a while and an old fashion cellardive brought it up again.QUOTE]
Looks like a Ricoh Singlex TLS that has lost the TLS markings over time. Or the top plate could have been replaced at some point. The TLS also sold under other labels (Sears, Focal, Interflex, etc.) with different markings. A later version w/o the self-timer and with a limited shutter speed range was sold as the SLX and under various labels. The original TLS was sold from about '67 to '73. It should be an M42 screw mount as I have never seen any reference to any K-mount versions. When Ricoh switched to K-mount they went to the KR/XR model designations.
I bought A TLS used in '78 and I still have it. It works great other than the meter switch is getting finicky (common problem) and the lack of mercury batteries. I had it serviced once (late '80's) and replaced the door foam in 2000. To solve the battery problem, I use hearing aid batteries (675) with an adapter and the meter works great unless the switch acts up.
If you don't have a manual, see:
http://www.butkus.org/chinon/ricoh/ricoh_singlex_tls/ricoh_singlex_tls.htm
Battery adapter:
http://www.paulbg.com/Nikon_F_meter_batteries.htm