Bremont Supermarine S300/BK
The Bremont Supermarine S300/BK takes a 20 mm watch band.

Bremont · Supermarine
- Lug width
- 20 mm
- Case diameter
- 40 mm
- Reference
- S300/BK
- Family
- Supermarine
- Case material
- Acciaio
- Model
- Supermarine S300 Stainless Steel / Black / Temple Island
- Year
- 2017
Bands that fit
Cut and stitched in Milano, in the width this watch takes.
Will a strap close on your wrist?
Set for this watch: 40 mm of case and 20 mm between the lugs. Add your wrist and see where a standard strap would close.
mm
Filled in with the case diameter, which is what we hold for this reference. Measure the watch tip to tip for the exact answer: it is usually a few mm more.
Enter your wrist measurement to see whether a standard 75/115 mm strap closes on you, and where.
Sizing notes
- 20 mm is the gap between the lugs, so a 20 mm band goes in without adapters. Whether it sits flush against a 40 mm case depends on how that case is shaped.
- Inside the Supermarine family the lug width is not one number: it runs 20, 22 mm. This reference is the 20 mm one, so a band bought for another Supermarine may not fit it. Why the size changes inside a family →
- 20 mm is one of the common sizes: 15,081 of the 41,485 watches measured take it, which is why it is the width most bands are cut in. Every watch that takes 20 mm →
Other Supermarine references
- Supermarine 300M300M
20 mm - Supermarine 500M500M
22 mm - Supermarine S2000S2000
22 mm - Supermarine S2000 BraceletS2000br
22 mm - Supermarine DescentS2000Desc
22 mm - Supermarine Descent BraceletS2000DescBr
22 mm
Hammered Calfskin Strap Light Blue
Vintage Olive Green Calf Leather Watch Strap
Saffiano Cognac Strap
Black Saffiano Rubber Strap
Black Calfskin NATO Strap




