The verdict in three sentences
A first automatic watch is chosen first by its calibre (the engine), then by a case size that fits your wrist, and finally by the total budget — purchase plus a service every 5 to 7 years. In Dakar, between the heat, rainy-season humidity and harmattan dust, 100 m water resistance and a sapphire crystal are not luxuries but insurance. Expect 250,000 to 900,000 FCFA (about 380 to 1,370 EUR) for a serious automatic that will last twenty years; below 120,000 FCFA, check the calibre very carefully.
Automatic, quartz, hand-wound: what you are actually buying
An automatic watch is a mechanical watch whose mainspring is wound by the movement of your wrist through an oscillating weight (the rotor). No battery, no electronics: a mechanism of 100 to 200 parts beating 6 to 8 times per second. It lives as long as it is worn and serviced.
| Type | Typical accuracy | Energy | Lifespan | Maintenance (Dakar, 2026) | Best for |
|---|---|---|---|---|---|
| Quartz | ± 15 s / month | Battery (2 to 3 years) | 10 to 15 years | Battery 5,000 to 15,000 FCFA | Absolute accuracy, zero fuss |
| Automatic | -20 to +40 s / day (entry) · ± 5 s / day (good calibre) | Wrist (rotor) | 20 to 50 years | Service 45,000 to 120,000 FCFA every 5 to 7 years | Object lovers, heirlooms |
| Hand-wound mechanical | ± 10 s / day | Crown, daily | 20 to 50 years | Service 50,000 to 150,000 FCFA | Purists, thin cases |
| Solar | ± 15 s / month | Light | 15 to 20 years | Almost none | Travellers, heavy use |
The 6 calibres you will meet most often
The calibre is the most important and least readable piece of information for a beginner. These power the majority of accessible watches sold in Dakar, with what they are really worth.
| Calibre | Origin | Power reserve | Frequency | Factory accuracy | Watch price range (FCFA) |
|---|---|---|---|---|---|
| Seiko NH35 / 4R35 | Japan | 41 h | 21,600 bph | -20 / +40 s/d | 120,000 to 350,000 |
| Miyota 8215 | Japan | 42 h | 21,600 bph | -20 / +40 s/d | 90,000 to 250,000 |
| Miyota 9015 | Japan | 42 h | 28,800 bph | -10 / +30 s/d | 250,000 to 500,000 |
| Seiko 6R35 | Japan | 70 h | 21,600 bph | -15 / +25 s/d | 400,000 to 800,000 |
| Sellita SW200 | Switzerland | 41 h | 28,800 bph | ± 12 s/d (elaboré) | 500,000 to 1,500,000 |
| ETA 2824-2 | Switzerland | 38 h | 28,800 bph | ± 12 s/d (elaboré) | 600,000 to 2,000,000 |
Two rules to remember: a well-regulated Japanese calibre beats an anonymous "Swiss" one, and a 70-hour power reserve (Seiko 6R35) is a real comfort if you rotate two watches — yours is still running on Monday morning after a weekend in the drawer.
Case size: the wrist chart we use in store
In Dakar we often hear "44 mm, it shows more". A watch that is too large overhangs the wrist and catches on boubou sleeves. The right size is read from your wrist circumference, measured flat just below the bone.
| Wrist circumference | Recommended diameter | Max thickness | Lug width (strap) |
|---|---|---|---|
| 14 to 15.5 cm | 34 to 37 mm | 10 mm | 18 mm |
| 15.5 to 17 cm | 37 to 40 mm | 12 mm | 19 to 20 mm |
| 17 to 18.5 cm | 39 to 42 mm | 13 mm | 20 to 21 mm |
| 18.5 to 20 cm | 41 to 44 mm | 14 mm | 22 mm |
| over 20 cm | 43 to 46 mm | 15 mm | 22 to 24 mm |
An often-forgotten criterion: the lug-to-lug length must stay below the width of your wrist. A 40 mm watch with 47 mm lug-to-lug sits better than a 42 mm with 52 mm.
Water resistance, crystal, strap: the Dakar climate trio
- Water resistance: "30 m" means splashes only. Aim for 100 m (10 ATM) with a screw-down crown for August rain and daily ablutions.
- Crystal: sapphire resists dust scratches; mineral glass (hardlex) scratches within 2 years of urban use. Sapphire premium: 20,000 to 60,000 FCFA, always worth it.
- Strap: leather degrades quickly with sweat (12 to 18 months). Plan a second rubber or steel strap for the hot season; a quality leather strap costs 25,000 to 60,000 FCFA.
- Rotor and magnetism: keep the watch away from speakers and magnetic bag clasps — a magnetised calibre drifts several minutes a day; demagnetising costs 5,000 to 10,000 FCFA at a watchmaker.
Mini case study
Moussa, a bank executive in Plateau, 17 cm wrist, budget 400,000 FCFA "all-in for 10 years". Choice: a 40 mm automatic, Seiko NH35, sapphire, 100 m, steel bracelet plus a spare leather strap.
- Purchase: 320,000 FCFA
- Extra leather strap: 35,000 FCFA
- Service in year 6: 60,000 FCFA (2026 estimate)
- One-off demagnetising: 8,000 FCFA
Total over 10 years: 423,000 FCFA, roughly 3,500 FCFA per month — less than a branded quartz watch replaced twice over the same period (2 × 250,000 FCFA), and an object he can pass on.
