To add to what Topgun has stated, the FW frame did replace the Regular frame on hammerless guns only. Hammer guns in 16 ga. and other gauges were all made on Regular frmaes unatil the end of production for them in 1932.

It must have been after 1914 that the Regular frame 16 ga. were discontinued, as I have a 1914 Trap Gr. on a Regular frame.


David