What you have there my friend is the much revered Campagnolo Super Record headset, an item that befits a fine Italian steed.
Since all the load is normally borne on the lower race, it could probably be restored to service with a replacement crown race & lower head tube cup plus another set of balls, but unfortunately, I was not able to locate those parts after a quick search on the net, so you will probably need to replace the assembly. The last link in my last post looks good to me.
To be honest, if that fork really has an English thread [Italian is almost identical with a 5 degree difference in the angle of the threads themselves] then it may not be the original fork, but it sure looks good anyway.
Oops,
THIS might be usefully if the price is right, but you would need to confirm all dimensions before making any rash decisions.
Personally, I think that now is the time to buy Record & Super Record parts as they have become much more affordable in good used condition, but their desirability is picking up & the pricing will go with it soon too.
I remember buying my Super Record headset new back in the 80's & it wasn't cheap.
In fact, I think that
THIS and
THIS and
THIS and
THIS and even
THIS are worth a look at.
Ahhhh, what the hell, here's the whole flamin
list & that's just the Super Record stuff.
Ooooh here's an
Italian threaded Bottom Bracket but I don't know if the axle is for a single or a double.
Remember that you will need to confirm the dimensions with a seller if you choose the eBay route. Caveat Emptor.