# Zenith El Primero Rainbow 02.0360.400 Review by A.I. WatchMetrics

## Watch Summary
The Zenith El Primero Rainbow 02.0360.400 is a luxurious sports chronograph blending high horology with jewelry flair, featuring a 40mm stainless steel case topped by a dazzling rainbow-colored sapphire bezel with 44 cabochon-cut gems, a mother-of-pearl dial accented by 11 diamond hour markers and luminescent hands, targeting affluent collectors and enthusiasts who crave technical prowess paired with vibrant, eye-catching elegance; powered by the legendary in-house El Primero 3600 automatic chronograph movement beating at 36,000 vph with a 50-hour power reserve.

## Overall Watch Rating: 9.2/10.0

**Movement Metric (9.9/10.0)** - The El Primero 3600 delivers column-wheel chronograph precision, high-beat performance, and refined finishing comparable to the best in Omega's Speedmaster chronographs.
**History & Innovation Metric (9.8/10.0)** - Zenith's pioneering El Primero, the first automatic chronograph with 1/10th-second timing since 1969, sets a benchmark unmatched by most modern movements.
**Dials & Design Metric (9.7/10.0)** - The rainbow sapphire bezel and diamond-set mother-of-pearl dial offer exceptional originality and craftsmanship akin to Richard Mille's gem-set sport watches.
**Material Metric (9.6/10.0)** - Premium stainless steel construction with sapphire crystal, AR coating, and rainbow gem integration rivals Patek Philippe's high-jewelry cases.
**Brand Metric (9.2/10.0)** - Zenith's storied legacy in chronographs positions it solidly alongside Grand Seiko in the luxury tier.
**Rarity Metric (9.2/10.0)** - At around $32,000 on the secondary market with limited gem-set production, it matches the scarcity of special-edition Audemars Piguet Royals.
**Complications Metric (9.0/10.0)** - The tri-compax chronograph layout provides robust functionality on par with Rolex Daytona executions.
**Versatility Metric (8.5/10.0)** - Balances sporty 100m water resistance and jewelry aesthetics for dress-to-casual transitions like a Cartier Santos with extra bling.
**Functions Metric (7.5/10.0)** - Core timekeeping, chronograph, and date suffice but trail multifunction G-Shocks in sheer utility count.

## Total Performance Score (TPS): 8.9

## WM Collector Grade: A

## Performance Insights: Excels in movement, history, and design with standout jewelry elements, while functions are solid but average; delivers premium value well above its implied price point.

## TPS Interpretation: Strong Value: The watch outperforms expectations with iconic innovation and rare aesthetics at its price tier.

## Watch Data
[https://www.zenith-watches.com/cdn/shop/files/02.0360.4004_69.R782_1.jpg] - [Front view of Zenith El Primero Rainbow]; [https://www.zenith-watches.com/cdn/shop/files/02.0360.4004_69.R782_back.jpg] - [Display caseback showing El Primero movement]; [N/A] - [No specific lume photo]; [Rainbow El Primero] - [Zenith]; [El Primero Rainbow 02.0360.400] - [Switzerland]; [https://www.zenith-watches.com/us/en/product/chronomaster-el-primero-rainbow-02.0360.4004-69.r782] - [N/A]; [Mechanical - Automatic] - [El Primero 3600]; [3] - [40]; [48]; [12.8]; [20]; [100]; [50]; [36000]; [Super-LumiNova]; [30]; [Stainless Steel]; [Sapphire (anti-reflective)]; [Gem-set with 44 rainbow sapphires]; [Sapphire display]; [Push-pull]; [Black alligator leather]; [Round]; [Mother-of-pearl with diamond markers]; [Small seconds at 9 o'clock]; [Yes at 6]; [No]; [No]; [Yes]; [No]; [No]; [No]; [No]; [No]; [No]; [No]; [No]; [No]; [No]; [No]; [No]; [No]; [No]; [No]; [No]; [No]; [Yes]; [No]; [Yes]; [No]; [No]; [Yes]; [Yes]; [No]; [No]; [No]; [Yes]; [No]; [No]; [Yes]; [No]; [8.9] - [A]; [12000];

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