7924 x 2--IV.58, Tudor Subs, Big Crown, MN issue--posted by Addict

Note: "The first one on the right is a Tudor Ref 7924 Big Crown Circa IV.58, identical to the one on the left with black dial. Both are French Marine Nationale issue, Serial #s XXX715 and XXX716. Cal. Tudor 390 (looks like a Rolex 1030). Brevet crown ref :810 (Rolex big crown ref :800). Two different caseback styles, one engraved the other not." - A.