The Zenith A277 belongs to a particularly compelling generation of late-1960s sports chronographs, combining the functionality of a traditional hand-wound chronograph with the rotating bezel and robust construction associated with contemporary dive watches. Produced shortly before Zenith introduced the El Primero in 1969, the A277 represents one of the manufacture’s final expressions of the manually wound chronograph. Its substantial 40.5mm stainless steel case, broad bezel and strongly contrasting dial gave it considerable presence for the period and today make it one of Zenith’s most distinctive pre-El Primero sports watches.

The design is dominated by its reverse-panda arrangement, with a black dial, contrasting silver registers and elongated luminous hour markers surrounded by a prominent minutes track. A rotating black elapsed-time bezel extends the watch’s timing functionality beyond the chronograph itself, while pump pushers and long, bevelled lugs reinforce its purposeful character. Inside is the manually wound Zenith calibre 146H/146HP, developed by Martel, the specialist movement manufacturer that Zenith acquired during the 1960s. That connection places the A277 at an important point in Zenith’s chronograph history, immediately preceding the manufacture’s transition into the automatic El Primero era.