Bianchi frame ID
 

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Can anyone ID this Bianchi frame? It has an Omas headset (25.4x24), shimano braze on bottom bracket cable guides, shimano drop outs, 68mm bb shell. It seems to be a really light framset, just really scratched up. Any help with a model name and or year would be awesome!

Looks like an early 80's Limited with a replacement fork. Japanese built.

Thanks for your input, serial number ia AS11993 if that helps any

Does anyone know what tubing the Limited had?

1981 Japanese model. Based on the braze-ons, most likely a Limited, as previously suggested. During this period Limited were typically Ishiwata 022. If you want to be sure, pull the fork and check for a stamp on the steerer tube then check the size of the post. Ishiwata 022 typically uses a 27.2mm post, 024 uses a 27.0mm and a 26.8mm post is typical of a Tange tube set. Anything smaller than that is into the range of a plain gauge tubeset and a lesser model.