A very special little Campagnolo tool! This is the double ended wrench that fits the cone flats on the adjustable pulley wheels on the very first generation ( and second and so on for a while) rear derailleurs. If ya got one a doze, den ya need one a dezz.
Excellent condition, blued surface fully intact, extremely minor surface rust on a 1/16 inch area ( I expect fully removable w/ 0000 steel wool and WD40). About 8 cm. long; 7mm on one end and 11mm. on the other. Very thin.
I can't tell you how old this is. I have only seen two and this is one of um. I'm keeping the other. She is NOT marked "Campagnolo" anywhere; as original as far as I know. I do not know if they made them or if it appears in any of the catalogues but this is THE right tool for the job.
Seventy five bucks U.S. currency.
La Jolla, Ca.