Model: Zenith El Primero. Reference Number: 31898838. Case Size: 43mm. Case Material: Black Rose Gold Plated Finish on Brass Base. Case Shape: Round. Dial Color: Black. Dial Markers: Arabic Numerals. Hands Type: Baton Hands. Function: Chronograph, featuring a tachymeter, telemeter, and chronometer functions via counters; Automatic Winding Movement with Central Seconds Hand visible through the exhibition case back. Bezel Material: Rose Gold Plated Metal Ring (Rotating). Strap/Band Material: Rubber. Bracelet Clasp Type: Standard Deployment Clasp. Condition: EXCELLENT - Near perfect state, no signs of damage or use detected. Comes with Original Box but Original Papers are excluded. Includes standard one-year warranty from the boutique.