[deadin]

I've been watching this thread for the last week and am beginning to think this may be a "one-off" or tool room prototype that never went anywhere.

I'm basing my opinion on the fact that the depth of knowledge here is quite high and no one has come up with just what it is. The grips sit at a strange angle and look like they were "borrowed" from something else and the fit and finish somehow just doesn't seem like anything that went into production.