In a message dated 2/3/2003 2:28:19 PM Eastern Standard Time, kctommy@msn.com writes:
>I don't recognize the derailer though. Perhaps it was a retro fit, and
might be >worth something?
I believe the SX-610 Simplex is the model Simplex made into a Gipiemme derailleur that comes up on ebay on a regular basis.
Pete Geurds
Douglassville, PA