Just a FYI for those wondering what a Axeman-Anderson TK-50 coil looks like and what is was for. They were used to heat up water in hotwater storage tanks much like indirect hotwater heaters today but reversed with the coil in the boiler. the face is made of either solid brass or solid rout copper with 1 1/4" female npt fittings and two 3/4" pipes going from one pipe connection to the other.
