Sorry! The B on the fork and B at the top of the seat stays are stickers and I did not see anything stamped on the dropouts. Is there a specific location on the dropouts I should look? I had a hard time finding the serial number until I moved the bike at different angles while using a bright headlamp and then I could see the numbers. The numbers were not very legible. I had to sand some of the paint off to read the numbers. It doesn't appear that the bike was repainted or, if it was repainted, they were very thorough and did a good job. The paint is very uniform with no runs and the indented areas like the serial numbers show no other colors. However, repainting might be why the serial number wasn't very legible. I would guess a repaint job would probably have a somewhat thicker coat of paint than the original factory paint.