If diving with the eye-catching Reservoir Limited-Edition Hydrosphere Bronze on your wrist isn’t enough of an inducement to buying the technically unique dive watch, perhaps you’ll be enticed by an invitation to dive wearing it alongside renowned diver and photographer Greg Lecoeur.
The new inducement means each buyer of the Hydrosphere Greg Lecoeur Limited Edition will be offered a half-day of diving with Lecoeur in the Port-Cros national park in Hyères, France, during a session in September (not including insurance, accommodation and transportation).
Lecoeur is also a supporter of coral protection, and funds from the sale of each special edition Hydrosphere Bronze will be donated to the replanting of a coral through the Coral Gardeners Association.
Reservoir and Lecoeur have teamed to design and produce the fifty-piece limited edition of the bronze-cased watch. Lecoeur chose a blue sunray dial for the limited edition, and each watch will be delivered with a package of photographs from one of his exploration notebooks, all placed into in a handy waterproof carrying case.
The new fifty-piece limited edition series also features a Greg Lecoeur engraving on the back and his name on the dial. 
Reservoir’s Hydrosphere stands alone as the only single-hand functional dive watch we’ve seen. And while we’ve seen bronze encase more than a few nautically themed watches in recent years, the Hydrosphere’s unusual retrograde minute display and jumping hour module set it apart from traditional dive models while still upholding a diver’s need for highly legible dive timing, unidirectional bezel, helium valve and strong water resistance (here rated to 250 meters). Price: $4,850.
Specifications: Reservoir Hydrosphere Greg Lecoeur Edition (limited edition of fifty pieces)
Case: 45mm bronze with satin finish, unidirectional ceramic rotating bezel with double scale for reading the time at different diving depths before and after the retrograde minute hand’s return, helium valve, stainless steel screwed back, screw-down crown, water resistant to 250 meters.
Dial: Blue with sundial finish, white index, magnifier on the jumping-hour window.
Movement: Automatic with patented proprietary 124-piece module on ETA 2824-2 caliber, with retrograde minutes, jumping hour, power reserve of 37 hours, power reserve indicator.
Strap: Black rubber screwed onto the body, additional blue NATO strap provided, mounted on bronze stirrups.
Price: $4,850.
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