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1982 I think - it says so on the headbadge :) He had to retire from pro racing in the late 70s after a crash, and like ex-racers did in those days, became a framebuilder.
The nutted brakes will still fit. You might need some washers to get spacing right so the nut still screws on. And something to pad out the recess around the bolt... sometimes a presta valve washer/lockring works when threaded onto the brake bolt.
He started out here in the Netherlands early 1980 or something. So there must be some more lying around but not much I guess.