Ak Sourdough
Senior Member
Here's a good price on a gauge that looks vintage enough for me and has the correct scale for our unpressurized cooling systems.
https://www.ebay.com/itm/1134129927...ultOrganic&brand=Allis-Chalmers&ul_noapp=true
https://www.ebay.com/itm/1134129927...ultOrganic&brand=Allis-Chalmers&ul_noapp=true