Very interesting. It may be as Fixcinater said, somebody removed the trigger from an Vt and substituted a baseplate from an L1. Or maybe somebody had an VL2 and removed the film advance lever and substituted a knob wind.
You should post this over at RFF. Many Canon rangefinder aficionados over there, including Peter Kitchingman, Stephen Gandy as well as Peter Dechert. Maybe they can offer something.