Vincent Black Prince example of both the model and the marque left the production line on Friday, 16 December 1955. A 1955 Vincent Black Prince set a new auction world record for the model at Bonham's Summer Classic Sale of Motorcycles and Motorcars in June 2014, selling for £91,100. In 2018, a Vincent Black Lightning, stated to be one of only 19 surviving, set an absolute world record for the highest-price paid for a motorcycle in an auction held by Bonhams at Las Vegas, selling for $US929,000 ($1.16 million Australian). Vincent Black Prince The Vincent Black Prince was a British motorcycle made between
Vincent Black Shadow engine's ports. Early Black Shadows have a third inner valve spring not shared with the Rapide, but this feature was dropped from later bikes. Due to the low-octane 'Pool' petrol that was all that was available in the early post-war years, bikes of the period could have only low compression ratios. Although the prototype Black Shadow was built with a compression ratio lower than the Rapide's nominal 6.8:1, production Shadows have a ratio of 7.3:1 due to having different pistons from the Rapide, although still supplied by Specialloid. The Black Shadows have different carburettors than the Rapides, with Series B