Tutorial 6 min read
Omega Speedmaster watch strap guide
One black dial, four different directions. Explore suede, nylon, rubber and woven straps, starting with the 20 mm lugs of a specific Moonwatch reference.
Zenith · Defy
Defy 21 Ultra Colour
Ref. 9790019004/80R922T3/P
Watch details and strap advice
- Case diameter
- 44 mm
- Case height
- 14.5 mm
- Case material
- Titanium
- Case shape
- Round
- Water resistance
- 100 m
- Caliber
- El
- Dial
- Skeleton
The Zenith Defy 21 Ultra Colour Purple takes a 23 mm strap: measure between the lugs and that is the only number you need. With a 44 mm case and 100 m of water resistance, a thicker strap balances the case. Most straps here come with quick-release spring bars, so the swap takes a minute and no tool.
Read before you choose
All stories
Tutorial 3 min read
Choosing a NATO strap or a two-piece strap
Learn how NATO and two-piece straps attach to your watch, affect wrist height, and provide security so you can choose the right style.
Tutorial 6 min read
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.