After seeing your nice threesome pictures of Silverstones in the bottom of your post (Nic's, Bullitt's and your former one) it has however reminded of one thing about the flying (airplane-tipped or however you may want to call it) chrono minute hand.

: The chrono minutes and seconds hand are red and thin, rather
: than the thicker orange / black variety, with the
: "flying" (swept back) wings. It would surprise me that
: Heuer ever used these hands for these Silverstones. It would be
: strange for these hands to have been replaced in normal
: servicing, at this young age . . . so this is troublesome.

Heuer did use two different types for this minute chrono hand: on catalogues and on most examples we find the 'very swept back' (as it were...) as in your former Silverstone but later TAG-Heuer versions and some of the later Heuers, and most probably all the ones serviced in La-Chaux-de-Fonds, sport a T-shaped one like the one in Nic's Silverstone.
Both of them are surely legit, but I definitely like the former version more.

Cheers.
Fabrizio