Gamewell began using the BG-12 when it was acquired by Honeywell in 2003. Prior to that, Gamewell used the M46 and M-95 “Century” series pull stations. Meanwhile, Pittway (the patent holder of the BG-12) owned FCI since 1997 and was acquired by Honeywell in 2000. Honeywell merged the two companies in 2005.
I would guess that the M-69 was introduced sometime in the 70’s as a more modern design alternative to the Century, and discontinued in the early 90’s following new ADA requirements.