Have a few variants to add,
First is a 4" Model 14-3 (lower gun) from 1971 and 67-3 (top) which is really a SS copy of the Model 15-7 (perhaps the closest your gonna get to a four inch SS Model 14).


Muzzle view of a narrow rib 67-1 (left) compared with a wide rib 67-3 (right)


Model 15-7 Serial prefix BRC (left) with Model 14-6 serial prefix CAZ (right)