Technical Details & Model History

• Case: stainless steel, 37 mm diameter
• Movement: automatic Zenith El Primero caliber 3019PHC, one of the first automatic chronograph movements in history
• Dial: original aged dial with the classic tricolour configuration typical of the A3817 reference
• Inner Bezel: tachymeter scale
• Crystal: plexiglass
• Strap: high-quality black leather
• Reference: A3817
• Year of production: early 1970s
• Condition: excellent, completely original and well preserved

Key Features

• Rare version of the El Primero family featuring the tricolour dial
• 37 mm tonneau-shaped case with sporty lines typical of Zenith’s 1970s design language
• El Primero 3019PHC movement, one of the most iconic automatic chronographs ever made
• Original dial with beautiful, even patina—highly desirable among collectors

Historical Context

The A3817 is one of the most sought-after references from the first generation of the legendary El Primero movement, introduced in 1969 and still considered one of the greatest automatic chronographs ever produced. Its tricolour dial configuration and sporty case set it apart from other variants. This example, in excellent condition with a naturally aged original dial, represents one of the most appealing and collectible combinations for Zenith enthusiasts.