Sugar with her vintage AC Ace. Matching numbers unverified. Our new routine in the 7th Arrondissement occasionally takes us by Royal Automobile , a storefront broker-dealer of classic Jaguars, Porsches, Alfas, and other choice rides. It also acts as a modest shrine to America's greatest actor-Le Mans idols, Steve McQueen and Paul Newman. I noticed that several listings for sale in the window specified that the cars had "Matching numbers." For car collectors, matching numbers indicates that the vehicle contains original major components such as the engine, frame, and transmission--the very same ones that it had the very same day it rolled out of the factory for the very first time. This makes the car more valuable to some collectors, for some reason. What interested me more than the originality of the vehicles for sale (which does not interest me at all, since I do not collect, buy, sell, or underwrite vintage vehicles) was that except for the phrase "matching numbe...