Columbian L6 JB three blade bronze cleaver

[paavojaelvis]

Hi, folks!
I recently acquired an old Columbian cleaver "L6 JB". Diameter is 10 1/2" and pitch looks to be around 14"-15". Hub is cushioned, 20 mm smooth bore with shear pin. Fits to some 60's OMC? Hub has spun, so I'm going to fit a 14-spline Chrysler hub and run it in my '71 Chrysler 55 hp/15ft monohull racer from the same era. I would be very happy if somebody could tell me more about this propeller.