With it’s matte black, tri-level dial the 7070 is easily one of the most versatile styles in the 6139 line up. The case is finished in an “east to west” brush that’s paired with a polished beveled bezel. In contrast to the rich, dark dial, the hands and markers stand out in a crisp bright white. Framing the dial is a perfectly matched tachymetric chapter that’s angled upward toward the bezel that provides even more depth. Atop it all sits a beveled hardlex that flows seamlessly into the bezel. This example from December of ‘74 is a stunner. The case is unpolished with crisp edges, and the factory finishes still intact. The dial is perfect aside from some darkening visible in the luminous plots. The crystal is a NOS hardlex replacement free of marring or scratches. The hands are free of chipping or paintloss, and show a light even patina in the luminous. Attached is the original bracelet with a triple hinged design between the links. In keeping with is military styling, we’ve paired it with a olive drab RAF NATO that looks and feels great on the wrist. The 6139B is keeping near perfect time post service, and the chronograph functions are crisp and responsive. Overall, its a beautiful example that’s sure to be a fast favorite. 

Clockwork Synergy Olive Drab Double Layer Two-Piece RAF NATO (clockworksynergy.com)

Serviced 1/4/19

Diameter- 40mm

Lugs- 19mm