Riky asked about the bike that he posted two photos of here:
http://www.flickr.com/
This bike could indeed be a Stucchi & Prinetti, just as it could also be the product of any number of other manufacturers, or for that matter a small local builder. All of the lugs and the fork crown appear to me to be bog standard versions that any builder could readily purchase from one of the large wholesalers. In fact, if you look in an early 50's Bozzi catalogue, you can find quite similar headlugs listed as Serie congiunzione tipo Brianza. The same goes for the seatlug and fork crown.
Because of your location in the province of Belluno, if the bike was from a larger builder, I would expect that the bike is more likely to be one of the brands more readily found in your area. Especially given the vintage, it would have been rather unusual to find a Stucchi in the Dolomites. A more likely possibility would be an Atala. Check out the lugs on this one:
http://www.wooljersey.com/
or perhaps a Bottecchia or a Taurea, all of which were much more 'local' to where you are. Generally speaking, all of the major builders fitted 'branded' components on their bikes, so I would check to see if any of the components are branded. If not, I would tend to think that the bike is more likely to be from a small local framebuilder. Please do however be aware of the fact that the stem does not appear to be original to your bike, which could mean that the bike was modified from racing bike to city bike and now back to racing set-up (a quite common occurence on cambio corsa bikes in Italy).
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Steven Maasland
Moorestown, NJ, USA