Originally Posted by
T-Mar
The S/N format is consistent with Bridgestone. Head tube mounted pump pegs didn't start becoming popular until the late 1980s. Assuming Bridgestone, it could be 1990 but the Altus rear derailleur, if OEM, would point to 2000. Still, that might be a replacement derailleur as I definitely would not expect the Ambrosio rims on an Asian bicycle. What are the other major components?
It's a bit of a frankenbike - some 600, straight bars and some rapidfire shifters. No front mech.
On reflection - I am leaving it, but I think it is a Bridgestone. Stripped down, rebuilt (properly) and repainted, it would be a good bike.