I've read the threads, and have another early 80s mystery bike- one (poorly) stored for the past 20-odd years.
Seems as though there are enough threads on the same thing already, so..

Silver, with chrome front fork ends. 63 cm (25") from the center of the crank to the top of the seat post. Bianchi saddle, shimano altus derailers, 10 speed (front crank reads "custom") bottom of the crank housing has : 3 [ 8 ] [ 144 or 3 C 8 ]C144 (although the last "4" is poorly stamped) I'd think the character between the 3 and 8 is a capital C, if the one following the 8 wasn't the same thing, but backwards.. Wheel base measures at 107cm. The bike rides ok- but I'm trying to figure out how much effort to put into it. I suspect it's more towards the bottom end of the line, or has been "modified" by having the bits "downgraded". If so, I can continue the trend. I just don't want to offend a purist sometime in the future! Decals: Bianchi; edoardo bianchi; CR-MO; Piaggio. If there's interest, I can send a picture. Thanks!