Zodiac Sea Wolf (Ref. 691) Black Gilt Dial, 1959

Dealer description — Craft & Tailored

When discussing the pioneers of the modern dive watch, Zodiac is a name that deserves far more recognition than it typically receives. Throughout the 1950s and '60s, the brand produced exceptionally capable sports watches that competed directly with offerings from Rolex, Blancpain, and Tudor, yet today it remains one of vintage watch collecting's best-kept secrets. Introduced in the 1950s, the Zodiac Sea Wolf was among the very first purpose-built dive watches made available to the general public, helping establish the blueprint for the recreational dive watch years before scuba diving became a mainstream pastime. The ref. 691 represents the beginning of the Sea Wolf story as the model's inaugural production reference, making it a cornerstone for collectors of early dive watches. The earliest prototype examples lacked the now-iconic "Sea Wolf" signature on the dial and are virtually impossible to find. The first Sea Wolf-signed watches, while sharing the same ref. 691 designation is nearly as elusive. Distinguished by its unique glossy gilt dial featuring oversized Arabic numerals at 2, 4, 6, 8, and 10 o'clock, distinctive "windowless" hands, a countdown bezel, and early screw-down case back construction, the ref. 691 possesses a design language unlike any of its successors. These defining characteristics were carried over only briefly into the earliest ref. 699 models before Zodiac adopted a new direction for the Sea Wolf line. Completing this exceptional example is its original 1959 Zodiac-signed five-link stretch bracelet, a remarkably rare accessory, as most ref. 691s were originally sold on straps, making surviving bracelet-equipped examples seldom encountered today. SPECS Stock # ZSW691 Brand Zodiac Style Sea Wolf Model 691 Serial 11XXXXX Size Men's Material Stainless Steel Dial Black Gilt Millimeters 35 Bracelet Zodiac 5-Link Stretch Bracelet CASE & BRACELET The early Sea Wolf case features more accentuated lugs than its later variants, and the case on this example is exceptional, with no notable evidence of prior polishing once in, while retaining factory dimensions and sharp edges, with light signs of honest use. The early "countdown bezel" is very well preserved, showing no signs of a previous polish, though the factory enamel is mostly missing. The crown, signed with the Zodiac cross logo, appears to be an early replacement. The early screw-down case back shows light signs of honest use, retaining all of its original factory markings in fully legible condition. The original, and exceptionally rare, Zodiac 5-link stretch bracelet retains 12 links that show no actual stretch and only minimal wear. The bracelet will fit up to a 7.75-inch wrist. DIAL & HANDS The early glossy black dial with silver printed gilt text is simply beautiful and remains exceptionally well-preserved, especially for its age, with minimal marks and patina present. The oversized radium lume Arabic numerals and the radium lume plots all remain intact; the Arabic numerals mostly feature a charming beige patina, with darker spots present, while the outer lume plots feature a slightly darker patina. Under UV light inspection, the only notable degradation is partially missing lume in the 11 o'clock plot. The early radium-filled dauphine-shaped "windowless" hands have achieved a slight green coloration, which is very normal for this reference, and only the minute hand features a small spot of missing lume when inspected under UV light. ACCESSORIES