My antique thermostat collection

[zenith12]

I just got the 3 Honeywell’s what year are the Honeywell s

 

[fan-of-fans]

Don't know the years but those are very cool. The one on the top right reminds me of a transistor radio. I've seen the one that says MH on it before, in an old building around here when I was a kid.

I've always liked the round Honeywell thermostats.

 

[madman]

The Honeywell with the mercury switch is cool. Is that like a sealed pressure bellows that moves the switch, instead of a bi-metal spring? Is that the clock one that's rated at 120v? I would've imagined they'd all be 24v. The coulda made a 24v clock motor...

 

[zenith12]

Yes

Yes that is a set of bellows it is what they call a pneumatic thermostat. And the one with the clock is 24 volts it is a telechron motor likes used in a old electric wall clock