Originally Posted by T-Mar

It's the 170th frame, built during February 1978. The combination of brazed-on shift lever and water bottle bosses but top tube cable clamps is consistent with the era. The long Camapgnolo dropouts are also correct.

The curious aspect is the tubing decal. It is a pre-1978 decal used for Record, SL and SP. Normally, I would suggest that Bianchi was simply using up some old stock. However, the 1978 Campione del Mondo CX was spec'd with Columbus' new, midrange, plain gauge, Aelle tubeset which had it's own dedicated decal. Application of the subject decal would be incorrect and misleading, as it indicates a butted tubeset.

Consequently, it appears that bicycle may be at least partially decaled incorrectly, by either the factory or a previous owner, As a result, it may not be an actual Camapione del Mondo CX. The seat post diameter will tell us if it is actually Aelle and a Campione del Mondo CX.