of which there are 500 to 600 tops, the Pre-V are the...historical...ones. Somewhat "historical" are also the Pre-A (produced in 1997, year of the purchase from Vendome, but with all left over materials and components from Panerai) Of all the historical, the 5218-201A "logo" is THE most "important" one, since is the FIRST commercial Panerai ever produced (IMO) All the ones produced before 1993 were exclusively produced (on order) for the Italian Navy. For the true-blue/grass roots Panerai purists (including me) everything produced after 1997 it's just...Swiss stuff...that has nothing to do with the..historical Panerai period. Don't get me wrong, there are quite a few beautiful models (some breathtaking) produced after 1997 from the Vendome people but they are just modern Panerais.