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Old 10-16-12, 12:26 PM
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Sorry, I've never seen that serial number format on a Bianchi and I've collected literally hundreds of samples. It's definitely not the standard Japanese or Italian format for the era. However, all things taken into consideration, it's almost certainly from Japan. I can't make a definitive statement based on a sample of one but based on my previous serial number studies, my educated guess would be a 1984 model manufactured in early October of 1983. It would be interesting to know what the two letter date codes are on the back of the derailleurs and cranks, just to see if I'm in the ballpark or out to lunch.
T-Mar is offline