I now own three of these, two were given to me, and the third I picked up in a thrift store for $8.00 (and with a 28mm lens!). I have yet to shoot even a single photo with them, but maybe someday I will clean them up, try to find a battery and do things with them.
Back in the 1970's, my good friend Stan had one of these (and I had my trusty screw mount Pentax Spotmatic), we both took many fine pictures and argued about the relative superiority of our cameras. The one thing the minolta had that I did not was the mirror lock up control (A nice thing for microphotography for example). And the Minolta had nice fast bayonet mounts (but I didn't mind screwing and unscrewing lenses).
Here are some links to SRT101 information (there are LOTS of SRT101 pages out there on the internet, any search engine will find more):
The lenses use the MC mount (any MC or MD mount lens will work). Suitable lenses (usually Rokkor) will be marked M/MC or M/MD at the rear. In the late 1980's Minolta moved to autofocus lenses.
The Camera was introduced in 1966 in the days of the Nikon F and the Asahi Spotmatic (1964) MC stands for "meter coupling", not multi-coating by the way. This refers to being able to meter without having the lens stop down.
The meter uses a CdS detector and a 1.35 volt PX625 mercury battery. Mercury batteries were outlawed in the US in the 1980s and are needless to say, hard to get your hands on. It is said that the SRT101 will accept a S76/SR44 battery. The SR44 is a silver oxide battery. The LR-44 is the same size, but is a less powerful alkaline. Some cameras can use the 1.5 volt PX625A (aka Energizer E625G), but I don't know if the Minolta can or requires some surgery.
The SRT201 simply added flash sync to the shoe, making it a hot shoe and that is it!
Uncle Tom's Digital Photography Info / tom@mmto.org