Thanks to Billy Ewing, I now know what U.S. power insulator the Japanese NGK company copied to get this U-876 version. This NGK type also came in brown glaze. I have one but no picture of it. They are plentiful on my utility in sky-yuk color. This one had a bit of a salt air flashing problem and yes, that ridge pin its on WAS galvanized once upon a time! But it spent 20+ years on a pole 400 yards from the ocean. To see the unreported US power insulator Billy found, [id=309199438] To see an NGK for sale cheap [id=309542473]