Originally Posted by
Henry III
I also believe these were some of the first year Pana-mounts.
I suspect you're right.
Marc Muller has confirmed that there were some early (late '89/early '90) TIG-welded PDG OS Series road Paramounts that didn't have series numbers and were painted white. The lugged un-numbered bikes with red/white/blue team paint scheme may have been a similar exercise.
Here's one of the early white TIG'd un-numbered Series Paramounts.