Mysterious tubing

J

jsuomine

Retro Newbie
What is the tube of frame? The tubes have low 0.5 mm groove what shown in the pictures. The seller said that tubes are in Columbus Zona. But I have not found anything like it on the Internet. Frame was buy directly on the French columbus distributor. Is this frame some prototype or what?
 

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Hello, Colnago used to put ribs in their Columbus SL frame sets in the 80's. I had a Colnago Master with the gilco,square tubing from the same era,the seat lug looks similar.
 
My Moser Leader AX with Oria Tubing has that sort of appearance....... well sort of.

Shaun
 
Yeah, the ribs looks like Oria tubes.
 

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