Originally Posted by
Me_Too
. . . but the serial number may be "2 1261", or "12 1261". It could also be that the 6 is a distorted 8. Any thoughts? I'll post pics when I'm able.
Hello Me Too,
I think that your serial number should start with a letter. The letter determines the year the frame was manufactured.
Based on your description of the bicycle I think your Sekine serial number is "Y2 1261". The Y indicates the year 1974.