I just conducted a quick semi-scientific experiment with a Campy headset wrench and a Park HCW 12 on Chorus locknut from about ‘95, so not 1st Gen. I measured the “play” in the wrench, meaning the lateral distance the wrench would wiggle when slotted on the locknut, measured 5 cm back. In other words, a measure of how tight the wrench fits. The Park had 7 mm of play whereas the Campy was 3 mm. I did a quick look on a C Record as well without measuring and fit was the same. Kinda dorky I know but that’s how we roll here right? Reinforces the notion I’ve had that the Campy wrenches work better on their headsets.
Wrench is from 1973 BTW
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N = '96 Colnago C40, '04 Wilier Alpe D'Huez, '10 Colnago EPS, '85 Merckx Pro, '89 Merckx Century, '86 Tommasini Professional, '04 Teschner Aero FX Pro, '05 Alan Carbon Cross, '86 De Rosa Professional, '82 Colnago Super, '95 Gios Compact Pro, '95 Carrera Zeus, '84 Basso Gap, ‘89 Cinelli Supercorsa, ‘83 Bianchi Specialissima, ‘VO Randonneur, Ritchey Breakaway Steel, '84 Paletti Super Prestige, Heron Randonneur