I have one of those, Bull, a Craftsman I found new at Sears a few years back...it was in a box of those older sockets they painted red and sold off cheap maybe 15 years ago when there was a styling change in the socket line...
It is a 3/4 or 5/8 double broached with 6 point at both ends, nicely finished. I had to pay for it, since no one at Sears has any discretion to give away useless objects, but I had to have it.
Another...I unfortunately fixed it and it is now normal: I was tired of never having enough 1/4" extensions in any of my sets, so I went to Sears and bought about 5 6" extensions without even examining them.
The first I tried to use would not go into the socket...it was too large, and curiously soft in contour. A little violence resulted in a visible fissure in the surface, I pulled at it, and peeled off a spiral of Chrome! Still no go...and I pulled and peeled ANOTHER spiral of chrome! There may have been a third...don't remember. I was now standing in a little pile of roughly foot-long spiralized shiny strips...holding a perfect extension, clad in its normal slightly matte triple plating.
My flying guess is that it stuck to the rack during the final chrome layer of the triple plating and went through the chrome process multiple times, with rather thick deposits of further chrome but no real adhesion to the first layer.
