Thanks, great information there. hours lost yesterday...
D3586 is a standard 55 - 55cm seat tube, 55.5cm top tube.
D9551 is definitely custom - 55cm seat tube, 57.5cm top tube.
Odd one- as you said, that colour combination wasn't used for a pro team, not a nice colour scheme, dark metallic green and bright yellow. It is a different colour now :-)