If you can figure out what makes it a "reverse indexing" pawl I'd be interested to hear.
My Lipsey's .44 has this system, which can be seen via the extra little pin behind the cylinder, near the pawl. It does indeed align the cylinder holes with the loading gate for loading/unloading, but it does not seem to allow "reverse indexing". The cylinder will only turn in one direction (clockwise) once it has advanced past a certain point. Before that point it will rotate backward a little bit, but no more than one of my "old New Models" without the reverse pawl; You can't back it up to the last round, for instance.
Now my Bisley Hunter has a Power Custom free spin pawl, and of course that's completely different, allowing free movement in either direction, but having no clicks.
Based on this I guess I don't understand why they called this a "reverse indexing pawl", when all it seems to do is align the holes with the gate.
-- Sam