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.
IWC Schaffhausen · Portugieser
Portugieser Perpetual Calendar 42
Ref. IW344207
Watch details and strap advice
- Case diameter
- 42.4 mm
- Case material
- Stainless Steel
- Case shape
- Round
- Water resistance
- 30 m
- Movement
- Automatic
- Caliber
- 82650
- Dial
- Green
The IWC Schaffhausen Portugieser Perpetual Calendar 42 Stainless Steel / Green takes a 22 mm strap: measure between the lugs and that is the only number you need. We list 36 straps in that width. With a 42.4 mm case and 30 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.
Straps by lug width (22 mm) 36
All 36 22 mm strapsWidth is a starting point. Check the case and end fittings before choosing.
-
Heritage CuffLeather€27.90 -
Rivet CuffLeather €29.90 -
Slim Colour LeatherLeather€24.90 -
Rivet RallyLeather€49.90 -
Dense Mesh SteelSteel€34.90 -
Diagonal WeaveNylon€24.90 -
Regatta StripeNylon€22.90 -
Camouflage Five RingNylon€27.90 -
Square Slot SiliconeSilicone€22.90 -
Vintage RallyLeather€34.90 -
Denim StitchNylon€22.90 -
Aviator BundLeather€39.90
Read before you choose
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How to change a watch strap
Identify the attachment, release the correct part and check that both tips are seated. Illustrated instructions for quick-release bars, conventional bars and nylon pass-through straps.