Rolex Oyster Speedking Underline Dial Military Provenance Ref 6430Often with vintage watches, the value of a piece goes way beyond the watch itself and is more about the provenance and life its led. This Speedking was worn by a gentleman with a distinguished military career. The watch also has a special touch of a small underline on the dial, which was used to signify lesser radioactivity in the luminous mixture on the hour plots at the time that radium was being banned from use in watchmaking. We bought this fella