Columbus spiral help

[Southwestslacker1]

I've got a mystery Columbus tubes frame (no paint, no serial number, no clues) I'm just trying to make an educated guess at the tubing type using measurements and the Columbus tubing chart.
My question is regarding the helical reinforcement inside tubes, does this extend from end to end right through the tubes or does it stop before the butted sections?
Also how long are the butted sections at the ends of the tubes?
I can get a little look up the inside of the down tube and seat tube through the BB shell but can't see any obvious spiral, but I don't know if I'm looking far enough.
Any help/advice would be appreciated.

 

[SammyS]

If no spiral visible,then it is not Columbus slx.Might be Sl or...How much does the frame weigh ?

 

[Southwestslacker1]

Re:

All the info is on this earlier post, looking at the seat tube and fame size I'm thinking possibly SP or SPX. It's not the end of the world but it would be good to have the right sticker on it when I spray it up.

viewtopic.php?f=12&t=380394

 

[SammyS]

Have you tried what size seatpost actully fits this mystery frame ? Seatpost size usually gives good indication of the frame tubing used.I had a Rossin with Columbus aelle tubing and 26.6mm seatpost,Bottechia Columbus slx and 27.2mm,Bianchi specialissima Columbus sl also 27.2mm.

 

[Southwestslacker1]

Re:

It came with a 26.4mm seat post in it which seems a good fit, not tried a 26.6 though.
I've been using this chart as a guide
http://equusbicycle.com/bike/columbus/columbuschart.htm

 

[SammyS]

Are you sure it's Columbus ? Or maybe seatube is inverted-upside down when the frame was made.

 

[Southwestslacker1]

Re:

All points to Columbus, size of fork blades and stays, Columbus dropouts, built in Italy...

 

[SammyS]

Weightwise the closest match would be Columbus cromor 2190g for tubeset.

 

[Southwestslacker1]

Re:

Ok, thanks for the help, I'll post up some pics when it's done