where are you? if your not in the US that could explain the change in the decal. try nail polish for touchup. the geomentry is pretty standard Bianchi. 73d hedtube and depending on size.... that looks like a 55? the seattube would be 75d on a 57 it is 74.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk