# Zenith Chronomaster Chronograph 01.0240.400 Review by A.I. WatchMetrics

## Watch Summary
The Zenith Chronomaster Original (ref. 01.0240.4004/21.C810) is a sport-luxury chronograph reviving the iconic 1969 design in a compact 38mm stainless steel case, powered by the legendary high-beat El Primero 3600 automatic movement with 60-hour power reserve and 36,000 vph for superior precision, targeting discerning collectors and enthusiasts who appreciate heritage chronographs blending vintage aesthetics with modern reliability on a steel bracelet.

## Overall Watch Rating: 9.1/10.0

**Movement Metric (9.9/10.0)** - The El Primero 3600 column-wheel chronograph with 5Hz beat rate and exceptional finishing outperforms most luxury competitors like Omega's Speedmaster calibers.
**History & Innovation Metric (9.8/10.0)** - Iconic as the first high-frequency automatic chronograph since 1969, it sets a benchmark unmatched by contemporary mid-luxury pieces.
**Material Metric (9.6/10.0)** - Premium stainless steel with domed sapphire crystal and meticulous brushing rivals higher-end Rolex constructions.
**Dials & Design Metric (9.5/10.0)** - The opaline silver dial with applied rhodium markers and vintage proportions evokes timeless elegance akin to early El Primero icons.
**Complications Metric (9.2/10.0)** - Sophisticated chronograph with 1/10th-second readout delivers reliability on par with Patek Philippe's entry chronos.
**Versatility Metric (9.1/10.0)** - Balances sporty chronograph utility with dressy refinement, suitable for daily wear like a modern Cartier Santos.
**Brand Metric (8.9/10.0)** - Zenith's storied luxury status with El Primero heritage holds strong against peers like Omega in the premium segment.
**Functions Metric (8.3/10.0)** - Solid timekeeping, date, and tri-compax chronograph layout provides dependable utility comparable to TAG Heuer Carreras.
**Rarity Metric (7.6/10.0)** - At around $9,500 retail, it offers decent exclusivity versus high-volume Seikos but lacks limited-production allure.

## Total Performance Score (TPS): 2.6

## WM Collector Grade: B+

## Performance Insights: Dominates in movement and history with the El Primero powerhouse, while rarity lags slightly, delivering exceptional value against an implied price of $1,100,000.
## TPS Interpretation: Good Value: The watch punches well above its weight in performance and heritage for the price, ideal for savvy collectors.

## Watch Data
[https://pic-chrono24.blue/684/5/68458555-0.jpg?width=860] - https://pic-chrono24.blue/684/5/68458555-0.jpg?width=860; [https://pic-chrono24.blue/684/5/68458555-1.jpg?width=860] - https://pic-chrono24.blue/684/5/68458555-1.jpg?width=860; [N/A] - N/A; [Chronomaster Original] - Chronomaster Original; [Zenith] - Zenith; [Chronomaster Chronograph 01.0240.400] - Chronomaster Chronograph 01.0240.400; [Switzerland] - Switzerland; [https://www.zenith-watches.com/us/en/product/chronomaster-original-chronograph-01.0240.4004-21.c810.html] - https://www.zenith-watches.com/us/en/product/chronomaster-original-chronograph-01.0240.4004-21.c810.html; [https://www.chrono24.com/zenith/chronomaster-original-ref-010240400421c810--id38458555.htm] - https://www.chrono24.com/zenith/chronomaster-original-ref-010240400421c810--id38458555.htm; [Automatic] - Automatic; [El Primero 3600] - El Primero 3600; [3] - 3; [Iconic sport chronograph with high-beat El Primero movement, silver opaline dial, and steel bracelet] - Iconic sport chronograph with high-beat El Primero movement, silver opaline dial, and steel bracelet; [38] - 38; [46] - 46; [12.25] - 12.25; [20] - 20; [50] - 50; [60] - 60; [36000] - 36000; [Super-LumiNova] - Super-LumiNova; [31] - 31; [Stainless Steel] - Stainless Steel; [Sapphire domed antireflective] - Sapphire domed antireflective; [Fixed steel] - Fixed steel; [Transparent sapphire] - Transparent sapphire; [Screw-down] - Screw-down; [Stainless steel bracelet] - Stainless steel bracelet; [Round] - Round; [Silver opaline] - Silver opaline; [Yes] - Yes; [Yes] - Yes; [No] - No; [No] - No; [Yes] - Yes; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [Yes] - Yes; [Yes] - Yes; [Yes] - Yes; [No] - No; [No] - No; [Yes] - Yes; [No] - No; [Yes] - Yes; [Yes] - Yes; [No] - No; [No] - No; [No] - No; [6.0] - 6.0; [B+] - B+; [1100000] - 1100000;

**A.I. WatchMetrics Review v37.4 Grok 4 Fast. December 19, 2025.**