Depends more on the frame than the headset. Also, Alpina seem to have offered different sizes of integrated headset over the years. Aluminium Dolans with 41.8mm (Campag/Italian) integrated bearings probably need a 47mm cover. You can measure across the top of the bare headtube with sufficient accuracy to choose a cover with the rule out of your school geometry set.
I didnt realise that you only stock 2mm ones now and the vernier was more for measuring that instead of across. Possible to do engraving ala the top caps?
It's possible, I suppose, but most of the headset cover is hidden by the stem. If you supply artwork and pay a price which will be set to discourage anybody else from asking, I'll happily take your money :-)
Depends more on the frame than the headset. Also, Alpina seem to have offered different sizes of integrated headset over the years. Aluminium Dolans with 41.8mm (Campag/Italian) integrated bearings probably need a 47mm cover. You can measure across the top of the bare headtube with sufficient accuracy to choose a cover with the rule out of your school geometry set.