Marine Big Date 5817

The Breguet Marine Big Date 5817 in stainless steel brings the storied Marine collection's nautical heritage into a refined sport-watch format. Its 39 mm case houses Calibre 517GG, which drives the model's defining big-date complication alongside a blue wave-guilloché dial that evokes the movement of open water. The reference 5817ST/12/5V8 occupied a distinctive position in the Marine line as an accessible yet thoroughly Breguet expression of the collection.

The Marine collection traces its roots to Breguet's historical ties with the French navy, and the 5817 reference extended that tradition into the contemporary era when it was introduced in the mid-2000s. Produced across roughly a decade and a half, the 5817ST/12/5V8 was a long-running pillar of the stainless-steel Marine offering. Its discontinuation around 2018 marked the close of a generation of Marine references before the line was refreshed with updated proportions and movements. Collectors regard the reference as a faithful embodiment of the Marine aesthetic at a case size that suits a wide range of wrists.