Hello fellow Centurionuts-

This isn't directly related to serial numbers, but I wanted to share anyways. For some time I have been wanting to replace the headset on my 1981 Semi Pro. I searched high and low to find out what size the fork crown would be, so I could purchase the headset before taking it apart: 26.4 ISO or 27.0 JIS? I found almost no information on the subject, so I took it apart, and discovered it is in fact a 27.0 JIS fork crown. Hope this will come in handy for someone!