This Zenith El Primero vintage 18 carat yellow gold automatic calendar chronograph wristwatch is limited edition, 51/900 Ref 30.0220 400. It features a white dial with raised gilt hour markers and a black outer ring displaying 1/5th second divisions and a tachvmeter scale. In addition to the gilt hands, there are dials at 3, 6 and 9 o’clock tracking seconds, 30-minute increments and 12 hour recordings.  An aperture between 4 and 5 0’clock shows the date. The case has a Snap-On back and the watch strap is black crocodile leather with an 18 carat gold buckle.

• Case Size: 37 mm
• Movement: Manual Automatic, No.85927
• Movement: 31 jewels
• Metal: Case and Bezel 18 carat yellow gold
• Dial: white
• Strap: Zenith leather
• Clasp: buckle
• Glass: Sapphire Crystal
• Weight: 78 grams
• Condition: pre-owned with minor signs of use, otherwise good/excellent