The Vespa Sprint (VLB) was a popular scooter of the 1960s and '70s. Later models (after 1968) sported turn signals and were called the Vespa Sprint Veloce, but were essentially the same scooter with a modified name and electric wiring. All Sprint and Sprint Veloce models used the 150 engine.
Earlier Vespa Sprint scooters used a 6 volt, 8 amp battery. The later (Veloce) model with turn signals requiresd a 6 volt, 11 amp battery. Both versions of the Sprint used 3.50-10 tires.