Speedmaster Chronoscope 43
Ref. 329.30.43.51.02.001
- Case diameter
- 43 mm
- Manufacturer spec
- Lug-to-lug
- 48.6 mm
- Manufacturer spec
- Thickness
- —
- Not published
- Lug width
- 21 mm
- Manufacturer spec
Retail price $10,700 (US, Oct 2026)
How the Speedmaster Chronoscope 43 wears
Its lugs add 5.6 mm to the 43 mm case, close to the 7 mm typical across the almanac, so its diameter is a fair guide to how it wears.
On our fit model it sits best on wrists from 6.75" to 8" (17.1–20.3 cm); below 6.75" the lugs start to reach the edge of the wrist.
Its 21 mm lug width is one of the most common strap sizes; 34 other watches here share it, so aftermarket straps are easy to find.
Will the Speedmaster Chronoscope 43 fit your wrist?
With a 48.6 mm lug-to-lug, here is how it wears across common wrist sizes. We estimate the flat top of each wrist from its circumference; measure yours for a closer answer in the fit finder.
| Wrist | Flat width (est.) | Fit |
|---|---|---|
| 6" | 47.2 mm | Lugs overhang |
| 6.5" | 51.2 mm | Snug, lugs near the edge |
| 7" | 55.1 mm | Ideal fit |
| 7.5" | 59.1 mm | Ideal fit |
| 8" | 63 mm | Ideal fit |
Specifications
- Reference
- 329.30.43.51.02.001
- Collection
- Speedmaster
- Status
- In production
- Case material
- stainless steel
- Crystal
- sapphire
- Water resistance
- 50 m
- Bezel
- blue anodized aluminium, tachymeter scale
- Dial
- silver
- Strap / bracelet
- steel bracelet, foldover clasp with comfort setting
- Style
- Chronograph
Movement
- Caliber
- Omega 9908
- Type
- manual
- Power reserve
- 60 hours
- Accuracy
- 0/+5 s/day (METAS Master Chronometer)
Takes 21 mm straps. See other 21 mm watches and straps.
More Speedmaster references
- OmegaSpeedmaster '57332.10.41.51.01.001
- Case
- 40.5 mm
- Lug-to-lug
- 49.6 mm
- Thick
- 13 mm
- OmegaSpeedmaster 38324.30.38.50.02.001
- Case
- 38 mm
- Lug-to-lug
- 44.9 mm
- Thick
- 14.7 mm
- OmegaSpeedmaster Dark Side of the Moon310.92.44.50.01.001 · “Dark Side of the Moon”
- Case
- 44.3 mm
- Lug-to-lug
- 50 mm
- Thick
- 13 mm
- OmegaSpeedmaster Moonphase Meteorite304.30.43.52.01.001
- Case
- 43 mm
- Lug-to-lug
- 48.6 mm
- Thick
- 13.6 mm
- OmegaSpeedmaster Moonwatch Professional310.30.42.50.01.001 · “Moonwatch”
- Case
- 42 mm
- Lug-to-lug
- 47.5 mm
- Thick
- 13.5 mm
- OmegaSpeedmaster Moonwatch Professional (sapphire sandwich)310.30.42.50.01.002 · “Sapphire Sandwich”
- Case
- 42 mm
- Lug-to-lug
- 47.5 mm
- Thick
- 13.2 mm
- OmegaSpeedmaster Pilot332.10.41.51.01.002
- Case
- 40.9 mm
- Lug-to-lug
- 49.6 mm
- Thick
- 14.7 mm
- OmegaSpeedmaster Racing329.30.44.51.01.001
- Case
- 44.3 mm
- Lug-to-lug
- 50 mm
- Thick
- 14.9 mm
Watches that wear the same size
Other watches within 1.5 mm of its lug-to-lug.
- SeikoProspex 1968 Heritage Diver's GMTSPB381
- Case
- 42 mm
- Lug-to-lug
- 48.6 mm
- Thick
- 12.9 mm
- CasioCasio Duro MDV-106MDV-106-1AV · “Duro”
- Case
- 44.2 mm
- Lug-to-lug
- 48.5 mm
- Thick
- 12.1 mm
- CasioG-Shock GA-2100GA-2100-1A1 · “CasiOak”
- Case
- 45.4 mm
- Lug-to-lug
- 48.5 mm
- Thick
- 11.8 mm
- CasioG-Shock GA-B2100GA-B2100-1A
- Case
- 45.4 mm
- Lug-to-lug
- 48.5 mm
- Thick
- 11.9 mm
- Grand SeikoElegance Spring DriveSBGA407 · “Skyflake”
- Case
- 40.2 mm
- Lug-to-lug
- 48.5 mm
- Thick
- 12.8 mm
- Jaeger-LeCoultrePolaris DateQ9068670
- Case
- 42 mm
- Lug-to-lug
- 48.5 mm
- Thick
- 13.9 mm
Same 21 mm lug width
All 21 mm watchesThese take the same straps as the Speedmaster Chronoscope 43.
- CertinaDS Action Diver 43mm Powermatic 80C032.607.11.051.00
- Case
- 43 mm
- Lug-to-lug
- 51.4 mm
- Thick
- 13.1 mm
- Grand SeikoHeritage 62GS Hi-Beat 36000SBGH351 · “Rikka”
- Case
- 40 mm
- Lug-to-lug
- 47 mm
- Thick
- 12.9 mm
- Grand SeikoHeritage 62GS Spring DriveSBGA413
- Case
- 40 mm
- Lug-to-lug
- 47 mm
- Thick
- 12.8 mm
- Grand SeikoSport Hi-Beat 36000 GMTSBGJ237
- Case
- 44.2 mm
- Lug-to-lug
- 50.6 mm
- Thick
- 14.4 mm
- IWCBig Pilot's Watch 43IW329301
- Case
- 43 mm
- Lug-to-lug
- 52.5 mm
- Thick
- 13.6 mm
- LonginesHydroConquest 41mmL3.781.4.56.6
- Case
- 41 mm
- Lug-to-lug
- 51.1 mm
- Thick
- 11.9 mm