Zenith 03.0550.400/02.C507 Grande Port Royal El Primero SS Silver Dial (31172)

31172 Zenith, Grande Port Royal El Primero, Reference 0550.400/02.C503.07, Stainless Steel on a Strap with a Stainless Steel Buckle, Automatic Movement, Silver Dial with Arabic Numerals, Chronograph, Date Between 4 and 5 O'Clock, Size: 51mm x 36mm, Thickness: 13mm, Sapphire Crystal, Display Back, Water Resistant to 50 Meters, like new with original box and stamped open papers.


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More about Zenith 03.0550.400/02.C507 Grande Port Royal El Primero SS Silver Dial

This is a stainless steel Zenith Grande Port Royal El Primero 0550.400/02.C503.07, It has an alligator leather strap with a stainless steel folding deployment buckle, and a scratch resistant sapphire crystal. It has rectangular chronograph push buttons, a signed pull out winding crown, and there is an exhibition sapphire display case back secured with 4 screws, and engraved with "MANUFACTURE ZENITH – STAINLESS STEEL – 0550.400," and a serial number. The 51mm by 36mm square three-body solid case, straight lugs, and flat bezel, are polished. The dial is silver with a "tropical" guilloche pattern, and black Arabic numeral hour markers around a black minute/second scale. The perimeter has a black tachymeter scale to 400 UPH, and there is a white-rimmed date aperture window between 4 and 5 o'clock. It has steel syringe-style hands with luminous inserts, and there is a center sweep chronograph seconds hand. It's water resistant to 50 Meters/167 feet, it has a 50-hour power reserve at full winding, and the 13mm thick case, dial, and movement are all signed.

This Zenith Grande Port Royal El Primero 0550.400/02.C503.07 has a mechanical automatic Zenith El Primero caliber 400 column wheel movement. It's rhodium plated, with fausses cotes embellishment, and it's constructed with 31 jewels, an anti-shock mechanism, a straight-line lever escapement, and a monometallic balance, and a self-compensating flat balance spring. The mechanism oscillates at a frequency of 36,000 vph (5 Hz).

The Zenith Grande Port Royal El Primero 0550.400/02.C503.07 was introduced in the 2000's.