N.B. Watch is never worn - There are scratches due to the case but not from use - the strap is stained as shown in the photo - the blue plastic on the case back is still present. Zenith El Primero Chronograph 06.0050.400 Yellow Gold 18 Kt 40 Mm White Dial Full Set 1997. Zenith Chronograph El Primero Automatic gold 18ct Ref. 06.0050.400 Ref. 06.0050.400, men's watch, yellow gold 18ct, diameter approx. 40mm, height approx. 12mm, sapphire crystal, automatic manufacture chronograph, hours, minutes, seconds, stop function, date, white dial, a Zenith brown alligator leather strap ( spot as pics) with Zenith pin buckle in 18 kt gold yellow . The Zenith Chronograph El Primero Automatic Ref. 06.0050.400 is a high quality and iconic watch from the renowned Swiss brand Zenith. Combining precise craftsmanship with a classic design, this watch is known for its outstanding performance and reliability. The case of the Zenith El Primero Automatic Ref. 06.0050.400 is made of 18ct gold and has a diameter of 40 mm. The dial is in an elegant white. At the heart of this watch is the legendary El Primero automatic chronograph movement, known for its high frequency of 36,000 vibrations per hour. The Zenith El Primero Automatic Ref. 06.0050.400 has a stop function, a small seconds at 9 o'clock, a 30-minute display at 3 o'clock and a date display between 4 and 5 o'clock. With its timeless design and high precision, the Zenith Chronograph El Primero Automatic Ref. 06.0050.400B is the perfect watch for anyone looking for a classic yet powerful wristwatch. This watch embodies Zenith's long tradition and technical know-how and is a true masterpiece on the wrist of every watch lover. Box and paper as pics.