Also in the collection |

Simplex 4904-9139
Category : Simplex
I believe that this strobe plate was designed to be used with bells, such as the Simplex 2901-9333.

Federal Signal 950B
Category : Federal Signal
I’m not sure why there is a transformer on the side of this alarm.

Siemens CH-MC-W
Category : Siemens
This is basically the white, Siemens-branded version of the Wheelock CH70-24MCW.