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Zenith Chronomaster Original 38mm Mens Watch Grey
Ref. 03.3400.3610/39.C910
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Stepping up in Zenith's range
Chronomaster Sport 41mm Mens Watch Grey£16,100
Chronomaster Sport 41mm Mens Watch Skeleton - Interchangeable Strap£14,500
Chronomaster Sport 41mm Mens Watch Skeleton - Interchangeable Strap£14,500
Defy Skyline Chronograph Skeleton 42mm Mens Watch Black Interchangeable Strap£14,500
Chronomaster Open 39.5mm£21,300
The El Primero movement has been at the centre of Zenith's identity since 1969, when it became one of the first automatic chronographs to run at 5 Hz. The 3610 fitted here is its direct descendant, and the high frequency still does something useful: the central chronograph hand completes a full sweep every ten seconds, which means it shows elapsed time to a tenth of a second — a resolution that most mechanical chronographs simply cannot match. At 38mm, the case sits closer to the proportions of classical watchmaking than the 41mm versions, and at 12.60mm it wears with less bulk on the wrist than its complication count might suggest. A triple calendar with moonphase — day, month and date in separate apertures, the lunar display nested inside the 60-minute counter — typically demands architectural concessions in thickness; this one largely avoids them. The slate opaline dial, with its silver-white subdials, keeps all of that legible at a glance rather than turning it into a puzzle to solve. The sapphire caseback is the detail that earns its keep over time. The 3610's column wheel and the characteristic star-shaped rotor are clearly visible, and given that El Primero's history is genuinely worth looking at, it is not mere decoration.
- Reference
- 03.3400.3610/39.C910
- Brand
- Zenith
- Collection
- Chronomaster
- Case size
- 38mm
- Case thickness
- 12.60mm
- Case material
- Stainless steel
- Case shape
- Round
- Dial
- Grey
- Crystal
- Sapphire
- Movement
- Automatic
- Calibre
- El Primero 3610
- Functions
- Chronograph, Date, Moonphase
- Water resistance
- 50m
- Bracelet / strap
- Leather strap
- Strap colour
- Blue
- Clasp
- Folding clasp
- Lume
- Super-LumiNova
- Retailer
- Mappin & Webb
Additional specifications
- Power reserve
- 60 hours
Learn more about Zenith
Georges Favre-Jacot founded Zenith in Le Locle in 1865, aged twenty-two, with an idea that was radical for the Swiss industry: bring every trade needed to make a watch — movement, case, dial, hands — under one roof and one management. The integrated manufacture was largely his invention, and the Le Locle site he built is still in use.
The approach produced results at observatory trials, where Zenith accumulated more precision awards than any other manufacture. The name itself came from a calibre Favre-Jacot considered the summit of his work.
Its defining achievement is the El Primero of 1969, developed over seven years and announced in the same year as the Heuer-Breitling consortium's Calibre 11 and Seiko's 6139. It was an integrated automatic chronograph beating at 36,000 vibrations per hour, allowing measurement to a tenth of a second — a frequency almost nothing else matched for decades.
It nearly did not survive. When American owners ordered the mechanical tooling scrapped during the quartz crisis, a watchmaker named Charles Vermot hid the plans, presses, and cams in a walled-off attic. When demand for mechanical chronographs returned, Zenith could restart production because of him. Rolex used the El Primero in the Daytona from 1988 to 2000.
LVMH acquired Zenith in 1999.
- 1865
- Georges Favre-Jacot founds the integrated manufacture at Le Locle.
- 1969
- The El Primero automatic chronograph debuts at 36,000 vph.
- 1975
- Charles Vermot hides the El Primero tooling from destruction.
- 1988
- Rolex adopts the El Primero for the Daytona.
- 1999
- Acquired by LVMH.
Also in 6 collections
This watch appears in the Zenith Chronomaster range (19), Stainless Steel Watches (2,833), Automatic Watches (1,417), Chronograph Watches (1,131), Leather Strap Watches (904) and Grey Dial Watches (222).
Temporarily out of stock
Mappin & Webb is not currently taking orders for this reference. Last listed as available on 26 September 2026. Stock is checked nightly and this page updates when it returns.
What the specifications mean
A mechanical watch for everyday wear.
Strengths
- 38mm suits most wrists
- Sapphire crystal, which resists scratching
- Luminous hands and markers for low light
Worth knowing
- 50m suits rain and handwashing, not swimming
Zenith Chronomaster Original alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | 03.3400.3610/39.C910 | H9761 | 81005-11-3154-1CM |
|---|---|---|---|
| Price | £12,500 | £13,800 | £12,800 |
| Case size | 38mm | 38mm | 38mm |
| Water resistance | 50m | 50m | 100m |
| Movement | Automatic | Automatic | Automatic |
| Strap | Leather strap | Ceramic bracelet | Stainless steel bracelet |
| Power reserve | 60 hours | 70 hours | 46 hours |
| This watch | Closely matched |
|
Your new watch
Frequently asked questions, and things you should know about this watch
Can I swim with it?
Showering yes, swimming no. 50m covers splashes and brief immersion, but a swimming stroke generates well above the pressure that figure describes.
Water resistance explainedWill the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Sapphire, mineral and acrylic comparedDoes it need a battery?
No. It is automatic — the motion of your wrist winds it, and there is no cell to replace.
Quartz, automatic and solar comparedHow long does it run for when it's not worn?
About 60 hours fully wound — enough to survive a night off the wrist, but not a full weekend.
Is it a men's or women's watch?
Listed as men's, though at 38mm it sits in the range that suits anyone.
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