Mechanics 8 min read
How an automatic watch works
Your wrist gives it energy. A spring saves it. A tiny balance sets the rhythm. Follow the journey inside an automatic watch, one pencil drawing at a time.
Oris · Aquis
Aquis Date Calibre 400 43.5
Ref. 01400779041350782302PEB
Watch details and strap advice
- Case diameter
- 43.5 mm
- Case material
- Stainless Steel
- Case shape
- Round
- Water resistance
- 300 m
- Movement
- Automatic
- Caliber
- Oris
- Dial
- Blue
The Oris Aquis Date Calibre 400 43.5 Stainless Steel / Blue / Bracelet takes a 23 mm strap: measure between the lugs and that is the only number you need. Built for water, it wears naturally on rubber or a nylon NATO; a leather strap keeps it for dry days. With a 43.5 mm case and 300 m of water resistance, a thicker strap balances the case. Automatic movement. Most straps here come with quick-release spring bars, so the swap takes a minute and no tool.
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