I found this pair in a pawn shop, never seen their like before. The bigger of the pair has an opening of 2-3/8 and has the letter K as the only marking. The smaller is a Warren Webster, once a high profile heating system provider, maybe someone with experience in steam heat can chime in? Compared to general use wrenches they are very short for their jaw size. Both have seen some hammering on the shank, but no real damage.