This Ebay auction just goes to show you that even in these days of good quality reproduction parts and internet searches... some parts are still made of unobtainium. This large face square speedo is one of those items. The same size speedo was mounted on some of the '50's Vespas, but only the GS speedo was calibrated to 80 mph. (I believe it was a 120 kph speedo on the Euro models) These things are very hard to find since they are not being reproduced. This one was rebuilt and has a new lens and faceplate. It brought a whopping $280 at auction!
Now to rummage through my parts boxes...