I recently got this Bianchi, 55cm seat tube, S/N B9 03733 ( or could be 89 03733 ), Giepemme dropouts, Columbus chromor sticker, the down tube is like SBX ( getting oval towards the bottom bracket ), 27.2mm seat post. I was wondering how old is this bike exactly and is the Cromor sticker applied later since the downtube is an SBX? Any other thoughts and observations? Thanks.







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