Fire-Lite H355

Category : Space Age Electronics

That is an electromechanical horn on the rear of the strobe plate.

Category : Cerberus Pyrotronics, Pyrotronics

This is a rebranded Wheelock horn/strobe, and a pretty rare one at that since it has an electronic horn mechanism...

Category : Simplex

Another duplicate of the Simplex 2901-9833.