This bike in the picture of Morgan Hill museum is 1993 M2 Team.
Have a look to the seatpost collar and the different M2 font.
My M2 is 1991 from the serial number and from the cable hanger
This is a Bianchi Campione del Mondo 1957 in the same size of the Campionissimo Fausto Coppi 59.5x61cm:
i mozzi Fb 32 anteriore e 40 fori posteriore marchiati Bianchi in corsivo
Brooks B17
Fausto Coppi