Diamond K36 6 inch combination pliers, stamped "Duluth, USA" with the Diamond and Diamond-Horseshoe logos, and with "U.S.A." forged into the handles. $3, and in almost unused condition.
Nice find, ide say you did good :)
When if so did diamond go out of bussniess?
Diamond Tool, Diamalloy, was bought out back in 82 or so, then closed down. I recently got a nice pair of 14 inch water pumps with the Diamond logo, at a pawn for about $4. I try to collect the (crescent style) adjustable Diamond Calk and Horseshoe wrenches, have some 12 inch models with jaws 3/4in. thick. Very good pliers there,