Where did you get it
At an antique mall, along with a Simplex 2901-9333 bell & an old Interstate Engineering Vanguard Thermosonic mechanical heat detector.
Oh cool! I would love to find a century at an antique shop
Ooh, neat! I recognize the base, but not the head. Is the head a heat detector? (going by the open design which heat detectors commonly have)
Yes the head is a heat detector. It is EXTREMELY RARE
Oh wait, that one photo is of the label on the head, not the base, my mistake.
I know NewAgeServerAlarm once had F7 & R7 smoke detector heads (the only difference being the sensor type & design), along with a base very similar to the one you have. Does yours have a sounder in it going by the grille? (I don’t think NewAge’s did)
No. I think a sounder was an option. This heat detector is in the same family as the r7 and f7