Carla could tell you for sure, but I think the last bowrider was made in about 1967 or 68, so if your boat really is a bowrider, it's a lot older than you think! They were strictly a Moesly boat, never made by Potter.
Click on this link to
Moeslyseacraft web site to see a picture of the unique 1-piece molded stringer/bulkhead assembly that Moesly came up with for the 19. It was laid up separately and then bonded to the hull, possibly before hull was pulled from mold.