Round Risc

[Riggleman]

Found one of these months back. Yesterday I found two more. All 3 were found on adjacent properties where a lot of civil war artifacts have been recovered. They appear to be made of copper and the center has threads

 

[mojjax]

Wafer thermostat for a chicken brooder ?
Kline Thermostat Wafer 3" post, Incubators, For brooders, chickens, ducks | eBay

 

[BigWaveDave]

I have found a couple of these before.....had no clue either.
Thx for the ID mojjax

 

[tamrock]

[SOLVED] courtesy of mojjax