I just picked up a beautiful used set of Titleist 735 CM irons stamped with a hammer and anvil and "FSS." I used to play the chrome version of these irons and I know there was a stainless steel version made, too.
BUT - does anyone know what "FSS" stands for? I can't find anything much online.
Also, the set is 4-PW. All the clubs have the stamp except the 7-iron and PW. Any thoughts as to why they don't have the stamp? Replacement clubs maybe?