Rolex Daytona 'Zenith Inverted 6' Rolex produced circa 1978

produced circa 1978

and then set the hour and minute hands the usual way

Universal Genève beats the manually-wound Lemania Calibre 1873

the red arrow hand points to the time on a 24-hour military scale

an obscure hobby

Rolex Daytona 'Zenith Inverted 6' Rolex produced circa 1978We all know the Daytona Story, and it has proven to be a big favorite among the collectors. Why? Rolex's brilliant motorsports chronograph is in pole position in any category, vintage or modern. And while current automatic versions admittedly don't generally do as much for us as a nice hand cranking example, this particular iteration might be the exception to the rule. The timepiece you're looking at is a Reference 16520 Cosmograph, known among