After generous input from two forum members, we are starting to get somewhere with the list. I think it is probably wiser to keep everyones name anonimous due to the high values involved. Obviously it would be great if the "name Unknowns" would confirm ownership so this could become a defining list
UK 1x watch -name supplied- ownership confirmed
UK 1x watch - name unknown-unconfirmed
USA 1x watch- name supplied- ownership confirmed
USA 1x watch- name unknown- unconfirmed
Europe-1x watch- name unknown-unconfirmed
Japan- 1x watch -name supplied -unconfirmed
I'm hoping with anonimity guaranteed the other owners will confirm their ownership.The good news is, if this list is correct we know have six surviving :D