'vagner' fork-crown?
am intrigued about the campag rear-mech; if it's a non-standard jobbie,how come its two pivot-bolts sport the carlton 'c',similar to the hub-nuts?
then again,looking at the other rust-patches in the photo,the metal could have rusted through from the outside.
might be an idea to treat all the other rusty areas before they become holes too!
it looks like it has rusted through from the inside.
it looks to me like it could be saved by brazing a patch on it to strenghen it(or is this nonsense? i'm more used to repairing car bodywork!)
if it is repaired i would coat the insides of all the frame-tubes with car engine-oil or...
i have a campagnolo 'sport' headset,chromed steel like the record,but without the 'campagnolo brev.' script around the circumference of the cups.
dated late sixties/early seventies i think.