New York--One of the earliest-known Rolex Sea-Dweller Ref. 1665 watches that belonged to filmmaker and oceanographer Philippe Cousteau is expected to fetch up to $150,000 when it hits the auction block at Antiquorum Auctioneers later this month. 

Cousteau is the son of Jacques Cousteau, a French naval officer, conservationist, scientist, author and researcher who studied the ocean and forms of life in water. Philippe Cousteau was the lead photographer on many of his father’s expeditions, wearing the Sea-Dweller timepiece for 10 years before giving it to his close friend, Thomas Horton. 

This particular Sea-Dweller is extremely rare, Antiquorum said. The stainless steel diver’s chronometer wristwatch features center seconds, helium escape valve, double-red Sea-Dweller logo, date and Rolex Oyster fliplock bracelet. 

The watch bears one of the earliest serial numbers of this reference ever recorded, and “represents a unique opportunity for collectors to acquire a truly historic timepiece with an extraordinary provenance,” said Antiquorum President and CEO Evan Zimmermann. 

The watch will be included in the auction house’s Sept. 30 sale of “Important Modern & Vintage Timepieces,” which will be held in New York. 

Expected to lead the sale is a Patek Philippe Ref. 5213 with a high estimate of $750,000. Timepieces from Vacheron Constantin and A. Lange and Söhne also will be included in the auction. 

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