Introduced in 1969 and produced until being replaced by the Canonet GIII version in 1972. This is a nice compact rangefinder. QL stand for Quick Load, it is simple to load. Load the canister, extend the film lead to the orange mark and close the door. Simple. Too simple, I confess to opening it to make sure that it worked and even then watching the rewind knob to be sure it was turning as I advanced the film. A less suspicious user would have better results.