This picture and material, thanks to watchuseek forum, arrives directly from Gallet official archive.
It shows Jim Clark in 1965 with Gallet Multichron 12.
And this is the official notary document attesting to the written statement of J. Carlini, carburetor technician for Jim Clark, that he received the Gallet MultiChon model 12 from Jim Clark in Indy 1965.
The most important thing is that Jim Clark's family official loan this Gallet Multichron 12 to Gallet Museum! Not a dealer, not a collector... Jimm Clark's family.
It seems to me so clear...
Or we want talk about pictures of 1966, 1967 or 1968?
Maybe if Jo Siffert was alive in 1974 could wear a Silverstone instead of an Autavia out of catalogue!