Here's a tough U-1293 stamped: M.H. inside a green triangle and 1942. The rounded dome variety is tougher than the cable groove slotted version. Has some light use marks, tiny pings and discoloration and a small scratch. Wire groove has factory flaw where porcelain left line that is glazed over. Some chipping inside the 1/4" pinhole threading.

First email gets this rarely offered Korean insulator for the reduced price of only $25 plus 11 shipping. Thanks