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Zenith Defy Skyline 41mm Mens Watch
Ref. 03.9300.3620/01.I001
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Stepping up in the same dial colour
The Defy Skyline traces its geometry directly to the original DEFY of 1969, a case designed to be angular at a time when that was a provocation. This version carries that octagonal form forward and pairs it with something the original could not offer: the El Primero 3620, running at 36,000vph and displaying a 1/10th-of-a-second indicator that completes a full sweep every ten seconds. That subdial is not decorative — it is the reason the calibre exists, and it gives the dial a kinetic quality that a conventional seconds hand cannot. The sunburst silver dial is engraved with Zenith's four-pointed star, a pattern that reads as texture in flat light and as something considerably more resolved when the light catches it at an angle. The exhibition caseback earns its place here: the 3620 is a manufacture movement worth looking at. Zenith also includes a khaki rubber strap alongside the integrated bracelet, and the quick-change system means switching between them takes seconds without tools.
- Reference
- 03.9300.3620/01.I001
- Brand
- Zenith
- Collection
- Defy
- Case size
- 41mm
- Case thickness
- 11.60mm
- Case material
- Stainless steel
- Case shape
- Octagonal
- Dial
- Silver
- Crystal
- Sapphire
- Bezel
- Bidirectional rotating
- Movement
- Automatic
- Calibre
- El Primero 3620
- Functions
- Date
- Water resistance
- 100m
- Bracelet / strap
- Stainless steel bracelet
- Strap colour
- Silver
- Clasp
- Folding clasp
- Lume
- Super-LumiNova
- Retailer
- Goldsmiths
Additional specifications
- Lug-to-lug
- 46.3mm
- Power reserve
- 60 hours
- Strap
- Interchangeable
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 4 collections
This watch appears in the Zenith Defy range (23), Stainless Steel Watches (2,833), Automatic Watches (1,417) and Silver Dial Watches (630).
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
- 100m water resistance covers swimming and watersports
- 46.3mm lug-to-lug keeps the 41mm case wearable
- Sapphire crystal, which resists scratching
- Luminous hands and markers for low light
- Sits in the lower half of Zenith's range as we list it
Zenith Defy Skyline alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | 03.9300.3620/01.I001 | 104063 | 168619-3004 |
|---|---|---|---|
| Price | £8,700 | £8,900 | £8,670 |
| Case size | 41mm | 41mm | 40.5mm |
| Water resistance | 100m | 100m | 50m |
| Movement | Automatic | Automatic | Automatic |
| Strap | Stainless steel bracelet | Rubber strap | Leather strap |
| Power reserve | 60 hours | 42 hours | 54 hours |
| This watch | Closely matched |
|
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Frequently asked questions, and things you should know about this watch
Can I swim with it?
Yes. At 100m it is rated for swimming and snorkelling, though not for diving.
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.
Will it fit my wrist?
Lug-to-lug is 46.3mm, which suits wrists from roughly 16cm (6¼ inches) upward.
Lug-to-lug decides fit more than case diameter does.
How to size a watch to your wristIs it a men's or women's watch?
Listed as men's.
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