Wanted: Mercury Hunnywell Thermostats.
Preferably “New Old Stock “ ( NOS) (never used in box)
Must be able to observe that mercury is secure in bulb. No damage!!!
will consider excellent condition used.
These are not the new units!!!!
Classic vintage units only!!
If you are updating your system and your old one works, ill look at it.
I prefer as said : New “old” stock ( never used)