The speedometers, also known as mussel speedometers due to their external shape, were used in many old Vespa from the 1960's onwards. They are available in different versions, i.e. with different scaling for the speed (100km/h - 110km/h - 120km/h) as well as different designs of the dials (red - blue - black as well as with or without Piaggio logo).
Basically, the speedometers can be exchanged with each other, i.e. a 120km/h speedometer can also be used in a handlebar which was originally only intended for a 100km/h model. However, there are differences in the fastening technology. Round handlebar models have a different holder than trapezoidal handlebars. However, the holders can usually be changed.
NOTE: The thread of the union nut for the upper fastening has a thread M10x1,00mm.
So unfortunately none of the usual (Italian) Vespa speedo waves fit on this speedo.
TIP: Piaggio does not produce any speedo anymore but buys them in India. The quality of an expensive, supposedly original Piaggio speedometer is therefore identical with a much cheaper reprotacho.
NOTE: Without speedo bulb (required: 1x socket BA7S (original 1,2Wattt))
(machine-translated)