My '83 Nuovo Alloro has serial number imprinted on the seat tube (at the top). I thought that was normal for early '80s italian bikes. Also, mine has only one pair of water bottle bosses.
Mine had "Nuovo Alloro" stickers on the top tube, unfortunately, exactly where I put my hand while shifting... so I rubbed them off over time.

Then again, I'm not an expert.

Here's my thread for some pics. Although, our pics don't show the same parts of the bikes.
http://www.bikeforums.net/showthread...9682&highlight=