It looks like it could be adaptable to many brands with the mount for the steering cable pulley block on the front handle. The OMC brands come to mind.
It’s a shift mechanism, after market. It would mount to the steering eye on the front grab handle and put the paddle very near the tiller.
Not sure that this matters, but the SHAPE of the shifter looks very similar to the 1951-1953 Gale 5D10’s — of course, these were badge engineered to just about every store out there — just a thought.