Stewart,
Campy listed three (3) Record series rims: Pave & Strada @22mm width, and Crono @20mm. The listed weights were: Pave (365gm); Strada (330gm); Crono (280gm);
All featured double eyelets and were introduced around the C-Record era I believe, but check Chuck Schmidt's time line for accuracy.
Chuck Brooks Malta (Spring is here!! Time to ride! But no Record Cronos in Pot Hole Land!) NY