Chas:
Si, these are the Spanish ones. Visual difference off the top would be patina, and maybe studs holding the horns on vs bolts, of course the ID numbers and "Made in Italy" (obvious things) and then maybe on the quality side, I've heard the Italian carbs had better throttle shaft bearings, but that's all I know of that separates the two. Jim also makes his own linkage, which I'm sure use more readily available, yet adequate, componentry..for instance, back in the day they were using aircraft grade heim joints and such. That's about all I can think of at the moment as far as differences go.
- Allen.