Omega Seamaster Diver 300M 210.22.44.51.01.001
The Omega Seamaster Diver 300M 210.22.44.51.01.001 takes a 21 mm watch band.

Omega · Seamaster Diver 300M
- Lug width
- 21 mm
- Case diameter
- 44 mm
- Reference
- 210.22.44.51.01.001
- Family
- Seamaster Diver 300M
- Case material
- Ceramica | Sedna Gold, Acciaio
- Water resistance
- 300 m
- Model
- Seamaster Diver 300M Master Co-Axial 44 Chronograph Stainless Steel / Sedna Gold / Black / Rubber
- Year
- 2019
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: 44 mm of case and 21 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
- 21 mm is the gap between the lugs, so a 21 mm band goes in without adapters. Whether it sits flush against a 44 mm case depends on how that case is shaped.
- 21 mm is an odd size: most ready-made bands are made in even widths, so this reference needs one cut to measure or a band that runs in odd sizes. Why some watches take odd sizes →
- Inside the Seamaster Diver 300M family the lug width is not one number: it runs 18, 20, 21, 22 mm. This reference is the 21 mm one, so a band bought for another Seamaster Diver 300M may not fit it. Why the size changes inside a family →
- 21 mm is not a common size: only 2,956 of the 41,485 watches measured take it (7.1%), so ready-made choice at this width is narrower than at 20 or 22 mm. Every watch that takes 21 mm →
Other Seamaster Diver 300M references
- Seamaster Diver 300M Automatic 41 Titanium / Black / Bracelet2031.50.00
20 mm - Seamaster Diver 300M Automatic 36.25 Stainless Steel / Black / Bracelet2052.50.00
20 mm - Seamaster Diver 300M Automatic 36.25 Stainless Steel / Electric Blue / Bracelet2053.80.00
20 mm - Seamaster Diver 300M Automatic 41 Stainless Steel / Black / Bracelet2054.50.00
20 mm - Seamaster Diver 300M Automatic 41 Stainless Steel / Electric Blue / Bracelet2055.80.00
20 mm - Seamaster Diver 300M Quartz 36.25 Stainless Steel / Black / Bracelet2062.50.00
20 mm
Same lug width, other Omega lines
- Constellation Master Chronometer Small Seconds 34 Stainless Steel / Silver / Bracelet131.10.34.20.02.001
21 mm - Constellation Master Chronometer Small Seconds 34 Stainless Steel / Blue - Diamond / Bracelet131.10.34.20.53.001
21 mm - Constellation Master Chronometer Small Seconds 34 Stainless Steel / Silver131.13.34.20.02.001
21 mm - Constellation Master Chronometer Small Seconds 34 Stainless Steel / Blue - Diamond131.13.34.20.53.001
21 mm - Constellation Master Chronometer Small Seconds 34 Stainless Steel / Sedna Gold / Brown - Diamond / Bracelet131.20.34.20.63.001
21 mm - Constellation Master Chronometer Small Seconds 34 Stainless Steel / Sedna Gold / Brown - Diamond131.23.34.20.63.001
21 mm
Matte Black Alligator Strap
Matte Dark Gray Alligator Strap
Millennium Green Alligator Strap
Grey Hammered Leather Strap with Ecru Stitching
Hammered Calfskin Strap Light Blue