Speedwell Registry
Charles Young suggests Speedwell serial numbers can be interpreted as:
month/year/Nth bike produced that month,
i.e., PR1273008 would be December 1973, 8th bike produced that month.
The Classic Rendezvous “ARCHIVE #2” is a Google Group. Once you join, you can not post to the group forum but you can do searches for research information.
If you would like to join the Classic Rendezvous “ARCHIVE #2 please email Guy Apple at guy.apple00@gmail.com