KaiserM715
Kaiser Söze
Hmmm, I just bought a Warn hitch reciever w/ shackle. It says "WARN" and "USA" on the part that slides into the receiver and "WLL4-3/4T" "WARN" "3/4" on the shackle. The "WARN" is even smeard with red paint to make the stamped leatering stand out. The shackle pin reads "XY1OHS". It all appears hot dip galvanized. I got it off of E-Bay for around $47.00 - I think. I don't recall the load rating.
The important thing is that the shackle is stamped with a Working Load Limit - "WLL". The shackles you have to watch out for are the ones with an unknown / unspecified load rating.
The receiver hitch portion of mine did have USA stamped on it as well, but the shackle that came with it sounds just like yours and was just like the two extras I ordered which had "Made in China" on the package.