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The Zenith El Primero Sub Sea Diver A277 is one of the most distinctive and collectible chronograph dive watches of the late 1960s. Combining Zenith’s pioneering chronograph technology with bold sports-watch design, the A277 stands as a highly expressive example of the era’s transition toward versatile professional wristwatches.
Introduced during a period when tool watches were rapidly evolving in both capability and aesthetics, the Sub Sea Diver merges chronograph functionality with diving-oriented design cues, resulting in a highly legible and characterful reverse-panda layout. With its strong visual identity and El Primero family heritage, it remains a sought-after reference among Zenith collectors.
Powered by Zenith’s legendary manual-wind chronograph architecture, the model reflects the brand’s technical excellence and mechanical innovation during one of its most important historical periods. Today, the A277 is appreciated for its rarity, bold design language, and strong connection to Zenith’s early chronograph legacy.
Zenith Sub Sea Diver | Reverse Panda | ref. A277 from 1969
MOVEMENT: High-grade manual-wind chronograph movement, Caliber 146HP. Serviced and running strongly.
DIAL: Original black reverse-panda dial with tritium luminous markers and gilt/golden hands. Attractive vintage condition with original character.
GLASS: Domed plexiglass in good condition.
HANDS: Original golden hands with tritium luminous material.
CASE: Stainless steel case in very good vintage condition with strong proportions and honest signs of wear consistent with age. Screw-down caseback present.
BEZEL: Original bi-directional turning bezel. Edges show the age of the watch.
CROWN: Original Zenith crown present. Likely later replacement, not original to the watch.
BRACELET/STRAP: Black handmade Italian pigskin leather strap.
BRAND: Zenith
MODEL: Sub Sea Diver Chronograph
REFERENCE: A277
YEAR: 1969
MOVEMENT: Zenith Caliber 146HP, manual-wind chronograph, 17 jewels
CASE DIMENSIONS: 40 mm
CASE MATERIAL: Stainless steel
GLASS: Domed plexiglass
DIAL: Black reverse-panda with tritium lume
BRACELET/STRAP: Black handmade Italian pigskin leather strap
CLASP: Pin buckle
BOX & PAPERS: None
TAX: Differential taxation according to §24 UStG
