[CR]1971 Bianchi: Gas Pipe Tubing?

Howdy CR folks,

I scored what I believe is a 1971 Bianchi at Recycled Cycles. ( http://www.recycledcycles.com/ ) It has a serial number of 1G23429 on the top of the head tube. It doesn't have forged dropouts, and the brake bridge isn't sexy at all. Does anyone know what kind of tubing would be in this bike? I have pictures posted at:

http://home.comcast.net/~DeeVee/Bianchi/

I love the petina. It looks like one of my grandmother's handpainted Russian Easter Eggs.

Thanks, Steve Demchak Windy Seattle, Washington, USA

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