Originally Posted by
caterham
this frameset appears to be built after 1975 based on the headtube logo(D within a heart,& rainbow diamante below) and simpler,less labor intensive lug detailing.
But the long Campy DO's contradict the post-75 dating - my bike is '76-7, and has both the short DO's and the older style red scroll headtube decal.
Edit: as to the lug detailing and labor involved, there are good De Rosas and, um, less good De Rosas, as with most handbuilt Italian bikes.