I picked this up last week…

it’s a very rare piece, carbon tubes,

set into aluminum lugs, the headtube is stamped Colnago,

just like the Colnago Dual and Carbitubo..

the decor is Mapei GB, which I managed to pretty much confirm thanks to fellow forum members at the venerable Velocipede Salon site,(thanks again!),

so I’ll use this Dura Ace 7410 group …

and I changed the rims for silver ones..

the Dual , Carbitubo and this are all made by ALAN for Colnago,

you can see this shares the seat post lug with an Alan Record

they also share top tube cable guides, and one on this is damaged, so the Alan chivalrously donated one…

I just need to get a headset , and this one’s finished build wise, I still would like to find out what model, a Carbunitubo?

Here’s a mock-up to give perspective..

now the frame has been compared to the Alan Carbonio, but you can see the top tube cable guides on the Alan are in a different place..

and here’s a Colnago Dual cycloross, with a headtube stamp in the same location..

so I’d say we can assume it is a Colnago, made by Alan.

Further investigation has been fruitful, here is a Colnago Carbitubo

with two downtubes…

and the Colnago head tube stamp..

and here is a frame set in the same decor, but with one downtube..