Campag record hub bearings

Paul N.

Retro Newbie
Hello. I have an old Mavic rear wheel with a campag record hub. It has a screw on block. The axle recently snapped, and when I took the axle out I noticed that the hub appears to have 2 bearing races on each side of the axle. On my wheel only the outer races had ball bearings in them (1/4 inch size). The inner race was empty. What size ball bearings does it need?
I think the wheel dates to the 1980's (Mavic MA2 Argent).
Anybody know anything about these wheels because I obviously don't
Cheers
Paul
 
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