OutnBack

No idea which model or components are on it, & I've only seen photos & have not looked at it in person, but condition looks amazing for the age. Still has the original Perreli gran premio tires & a cool celeste pump. Bianchi experts care to weigh in on what it is & what it may be worth?

big chainring 

Thats about 1970-72 Bianchi. I remember the local Schwinn store having one, just one, for sale. My friends father bought it. Thought it was the ugliest color I had ever seen on a bike.

That one is in great shape other than the mattress saddle on it. I think it came with a plastic saddle... Unicanitor?

I think value would be around $200.

T-Mar

The rear derailleur is the claw version of a Camapgnolo Valentino Extra. This derailleur was introduced for the 1969 model year, so it's probably an early 1970s, boom era model. The claw mount indicates stamped dropouts, which means it's a hi-tensile frameset. As for the model, it's one of the Rekord variants, most likely a '71'. Essentially, these were Bianchi's entry level, club racing models with tubular wheelsets.

The replacement mattress saddle hurts the value. The Universal brake lever hoods are ready for replacement. Tyres probably need replacement. The biggest factor is going to be the condition of the bearing races. I wouldn't pay over $200 and possibly less, depending on bearing condition.

The serial number is typically stamped on the front of the collar of the top head lug. This will tell us the exact year.