I just acquired a 70's Schwinn Paramount,It is original except tires and seat.I am wondering about dating the bike?I have looked in the usual spots.the only thing I see on the rear left drop out is k15 and an A under the rt side of the seat lug.I looked at the waterford sight and this does not seem to apply.it does no have chrome and is painted in the wonderful orange color .it also has the campagnolo hubs with extra holes of urban legend.these holes are not bevelled and thus were not meant for spokes.just for weight savings? any help is appreciated, Brad Sasher Atlanta Ga U.S.A.