So it says Juventus in a few places, and on the headbadge it also says Bergamo. Where there should be a tubing decal it just says "Made in Italy". The downtube shifters and FD are Simplex, and the RD is a Shimano Skylark, which I'm assuming is a replacement for the plastic Simplex. The brake levers are DiaCompe, but the brakes say "Balilla" on them where the DiaCompe label would be. The cranks are cottered and neither they, nor the chainrings, nor the pedals have any identifying marks. The steel rims only say "Milano Sport", and the hubs are unmarked. There are wingnuts on both axles. The stem says ITM on one side, and on the other it says "Italy", except the Y is upside down. And I can't find a serial number anywhere. But the rainbow sticker on the top tube says: "Giro D'Italia 1965" and "Tour De France 1965". The big black decal on the seat tube says "Giro D'Italia 1965-67-69", "Tour De France 1965", "Campione Del Mondo 1964-65-67", "Milano (unreadable word)", and "Paris Roubaix"

It seems to be a lower end bike, with steel rims, safety levers, and cheap stamped pieces for the kickstand and brake bridge. But it's really light for having steel rims + cranks. I have a Univega Nuovo sport with steel rims but alloy cranks, and the Univega is far heavier than the Juventus. It weighs about the same as my Motobecane Grand Touring, which has alloy cranks and rims.

Here are the pictures: