Single In Single in July (SiJy) 2022 - day 27

Hey, Glen... I keep coming back again to look at this photo - which I really like by the way! - and puzzle over what exactly your subject is or was. And I'm not any closer to the answer now than when I started. So... what is it, anyway?
Good morning.
Its a component from a long unused refrigeration system in an old mansion that I do work at. It's a pressure switch of some sort. An old mercury switch. The mercury bulb is at the ens of the green wires. Its either an operator or safety cut out. Ill be back there today. I'll get some more pics.

Q
 
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