Two similar bikes, but different. One was team bike Del Tongo team from 1991. Ex owner wasn't sure who rode it. He told me that he bought it from Giovanni Pinarello in 1992 in his workshop -Treviso-. Mr.Giovanni told him that this frame was used in 91 for Giro d'Italia. The number stamped under bb between forks is 3 under number 4. The same numbers are on front fork. He mentioned that is maybe Mario Cipollini's ex team bike, but he wasn't sure about that. Size is 58,5x57 c-c. The rear brake bridge hanger isn't pantographed.
The second bike wasn't a team bike. It has internal brake cable. The rear brake bridge hanger is pantographed Pinarello. Size is 57x56,5 c-c. Was made in 1992.
When I found them, bought bikes weren't equipped properly. The have mixed C-Record groups with other more recent pieces.
Pinarello Gavia Del Tongo Team 1991
Numbers on bb
Numbers on front fork steerer tube
Pinarello Gavia Columbus TSX 1992