This is definitely the Olmo of 80's but I can't tell which model exactly. I've contacted with Olmo via their website but they didn't respond. If this bike features straight gauge tubing like
Scooper said, then this is not San Remo. I own San Remo and it's made of Columbus Cromor double butted tubing.
Bottom line: it's a pity we have very little information about these gorgeous bikes. San Remo, which is considered as mid-class bike, rides like a dream. I haven't try any other steel road bikes yet (only folders, city and mountain) but I can't imagine better ride quality. The ride is smooth like butter.