In 1973, Leica & Minolta collaborated to design the smallest, lightest of the M series cameras with Minolta producing the bulk of the lot.
Features include:
Features a meter needle exposure system which is highlighted by a selective TTL meter with a highly accurate spot pattern (only a few later version even had a meter!!)
Mechanical operation with the metered being powered by a Mercury 625 battery
Shutter speeds: 1/2 s to 1/1000, plus B (which are visible in the viewfinder)
Projected Parallax corrected framelines for 40, 50 & 90mm lenses (the outside edge roughly equals a 35mm lens)