Titanium dropouts made for Pino Moroni and Cecil Behringer's brazed ti bike project.
Fork steerer tube #693/1
said to be a re-branded Columbus rifled steerer.
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