The Longines Nautilus 6921 represents a pivotal moment in horological history as Longines’ very first dedicated dive watch. Launched in 1958, this "Skin Diver" had a remarkably short production window of only two years before being succeeded by the twin-crown Super Compressor.
This specific example is the highly coveted 6921-1, the very first series produced. With an estimated total production of only 550 units across all 6921 sub-references, finding an original first-series piece is an exceptional opportunity for any serious vintage collector.
What defines this particular piece is its stunning visual character. The original Radium-lumed Arabic numerals and hands have aged into a rich, warm "pumpkin" patina. Unlike modern reissues with artificial "faux-lume," this is authentic, decade-spanning aging that gives the black lacquered dial an unmistakable vintage depth.
Housed in a robust 40mm stainless steel case manufactured by the legendary Ervin Piquerez, S.A. (EPSA), the 6921 features pioneering "Compressor" technology. A key hallmark of this engineering is the original cross-hatch crown, which is a vital indicator of the watch's authenticity. The case back remains a masterpiece of tool-watch design, featuring the iconic, deep engraving of a skin diver with a harpoon.
Reference: 6921-1 (First Series, circa 1958)
Case Size: 40mm Stainless Steel
Movement: Automatic Longines Calibre 19AS
Power Reserve: Approximately 39 hours
Bezel: Original Bakelite rotating external bezel
Crystal: Period-correct Plexiglass (acrylic)
Water Resistance: Originally rated for 150 meters (Not guaranteed due to vintage nature)
Bracelet: Period-correct Stainless Steel Mesh
This is not a modern "Heritage" reissue; it is the original blueprint from Longines' Golden Era. For collectors who value rarity over utility, the 6921-1 is a "holy grail" of early dive watches.
Water resistance is not tested and cannot be guaranteed. Water resistance should not be relied upon and the watch should be kept away from water unless professionally pressure tested.
Please inspect the photos carefully to assess the condition of the watch before proceeding with your purchase.
Order by 2pm to collect in-store the next day or choose FREE UK Special Delivery for delivery within 48 hours. Standard International orders are dispatched the same day, fully tracked and insured (taxes and duties may apply).
The Longines Nautilus 6921 represents a pivotal moment in horological history as Longines’ very first dedicated dive watch. Launched in 1958, this "Skin Diver" had a remarkably short production window of only two years before being succeeded by the twin-crown Super Compressor.
This specific example is the highly coveted 6921-1, the very first series produced. With an estimated total production of only 550 units across all 6921 sub-references, finding an original first-series piece is an exceptional opportunity for any serious vintage collector.
What defines this particular piece is its stunning visual character. The original Radium-lumed Arabic numerals and hands have aged into a rich, warm "pumpkin" patina. Unlike modern reissues with artificial "faux-lume," this is authentic, decade-spanning aging that gives the black lacquered dial an unmistakable vintage depth.
Housed in a robust 40mm stainless steel case manufactured by the legendary Ervin Piquerez, S.A. (EPSA), the 6921 features pioneering "Compressor" technology. A key hallmark of this engineering is the original cross-hatch crown, which is a vital indicator of the watch's authenticity. The case back remains a masterpiece of tool-watch design, featuring the iconic, deep engraving of a skin diver with a harpoon.
Reference: 6921-1 (First Series, circa 1958)
Case Size: 40mm Stainless Steel
Movement: Automatic Longines Calibre 19AS
Power Reserve: Approximately 39 hours
Bezel: Original Bakelite rotating external bezel
Crystal: Period-correct Plexiglass (acrylic)
Water Resistance: Originally rated for 150 meters (Not guaranteed due to vintage nature)
Bracelet: Period-correct Stainless Steel Mesh
This is not a modern "Heritage" reissue; it is the original blueprint from Longines' Golden Era. For collectors who value rarity over utility, the 6921-1 is a "holy grail" of early dive watches.
Water resistance is not tested and cannot be guaranteed. Water resistance should not be relied upon and the watch should be kept away from water unless professionally pressure tested.
Please inspect the photos carefully to assess the condition of the watch before proceeding with your purchase.
Order by 2pm to collect in-store the next day or choose FREE UK Special Delivery for delivery within 48 hours. Standard International orders are dispatched the same day, fully tracked and insured (taxes and duties may apply).
