Hi Boucher, this wheel has been on ebay for a while and I think it is a good deal. Ducati Königswelle 750 F1 TT1 16x3.5 Tecnomagnesio Magnesium wheel / rim / Felge
http://r.ebay.com/F9e5Ei. Boucher, many subtle differences between not only Techos and Campys but even the when comparing Campys to Campys. The wheel on ebay has the magnesium ring that gives you the Ducati Brembo pattern. I suspect they were trying to make wheels that could be used for many applications. Early Campys had narrow hubs and the ID for the bearings was small. As time went on they made wider hubs and larger bearing ID's so they could use a wider range of bearings and adapters for different brake rotors. The hubs became wider so they could be machined down for different applications. Ducati cush (5 bolt) drive and Menani style cush (7 bolt) drives were used. I'm sure others were used. This is just my opinion from the different Campys I've used in building bikes. I am sure there is a Campagnolo historian on the Forum with better info. Lou