Can anybody help me out?

I just got an old bianchi.

Serial # (BB) = A 1599 L*4
FULL shimano 600 gruppo, parts say if or ie on them (rd-6207) which puts these in may/june 1984
whats left of the decals tells me "Special cromo poduzione columbus" and "made in italy"

Italmanubri bars, 3t post, brooks professional saddle, mavic rims.

Dropouts are stamped simply BIANCHI