Simplex 4251-21L
This is the “Local Alarm” variant of the Simplex 4251-21.
- Brand Simplex
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Simplex 2098-9806
Category : Simplex
This device is a permanent fixture in my Simplex 4004 wall system.
Space Age AV32+2DCD
Category : Space Age Electronics
That is an electromechanical horn on the rear of the strobe plate.
Radionics D571S
Category : Other
I always associate these re-branded Wheelock AS’s with Walmart. I’m sure others out there can also understand.