Zenith Chronomaster Sport — Ref. 18.3101.3600/21.M3100

Video footage available upon request. Open to offers. Bracelet sizing service available.


The Chronomaster Sport is Zenith's flagship modern chronograph — a watch that carries over fifty years of El Primero heritage into a refined, wearable 41mm package. This reference takes it to the next level, crafted entirely in 18K rose gold from the case to the engraved bezel to the bracelet. The black lacquered dial is paired with Zenith's signature tri-color chronograph registers, and the 1/10th of a second scale on the rose gold bezel gives the piece a technical presence that matches its precious metal construction. Powered by the El Primero 3600 — a high-frequency column-wheel chronograph beating at 36,000 vph — this is one of the few movements in the industry capable of measuring and displaying elapsed time to a tenth of a second. With pump-style pushers, an exhibition caseback, and 60 hours of power reserve, the Chronomaster Sport in full rose gold is equal parts tool watch DNA and top-shelf finishing.


Specifications

• Model: Chronomaster Sport
• Reference: 18.3101.3600/21.M3100
• Caliber: El Primero 3600 — 35 jewels, 36,000 vph (5 Hz), column-wheel chronograph
• Case Material: 18K Rose Gold
• Case Diameter: 41mm
• Case Thickness: 13.60mm
• Bezel: 18K Rose Gold, fixed, engraved with 1/10th of a second scale
• Crown: Push-pull with pump-style chronograph pushers
• Crystal: Domed sapphire crystal with anti-reflective treatment on both sides
• Caseback: Transparent sapphire crystal (exhibition)
• Dial: Black lacquered with tri-color chronograph counters
• Bracelet: 18K Rose Gold
• Clasp: Folding clasp
• Movement: Automatic
• Power Reserve: ~60 hours
• Water Resistance: 100 meters (10 ATM)
• Functions: Hours, minutes, small seconds (9 o'clock), date (between 4 and 5 o'clock), 1/10th of a second chronograph — central chronograph hand (one revolution per 10 seconds), 60-second counter (3 o'clock), 60-minute counter (6 o'clock)

Condition Report

• Case: 10/10
• Bezel: 10/10
• Crystal: 10/10
• Dial/Hands: 10/10
• Bracelet: 10/10
• Clasp: 10/10
• Caseback: 10/10

Polishing Status: Unpolished
Condition: Brand new
Photos taken on full bracelet links, fitting approximately a 20cm (8 inch) wrist.


Delivery Contents

• Complete set — box, papers, warranty card, manuals
• Full bracelet links included
• Brand new from authorized dealer

Please refer to photos for full contents.


Service & Authenticity

• Service History: Brand new — N/A
• Warranty: Active — card dated October 9, 2026, covered through October 2031 (Zenith 5-year warranty with registration)

Shipping & Legal

• Based in: Cullman, AL
• We serve buyers in Nashville, Atlanta, and Memphis — insured shipping or in-person meetup available.
• Shipping: Fully insured overnight with tracking provided
• Shipping within CONUS only
• Buyers are responsible for any applicable taxes and duties
• Watch is sold in accordance with United States laws and regulations

All watches are inspected by our watchmakers for condition, authenticity, and functionality before sale. Feel free to reach out via messenger with any questions.