OMEGA · Speedmaster First OMEGA in Space and Speedmaster '57
OMEGA 310.30.40.50.06.001 vs OMEGA 332.10.41.51.01.001
11 published specifications differ between these two, and 3 are identical. Every figure below is what the manufacturer states for that reference; nothing is inferred from the other watch.
What differs
| Specification | OMEGA First OMEGA in Space 39.7mm, blue-grey dial310.30.40.50.06.001 | OMEGA Speedmaster '57 Co-Axial Master Chronometer Chronograph 40.5mm332.10.41.51.01.001 |
|---|---|---|
| Case | Steel, 39.7 mm | Steel, 40.5 mm |
| Diameter | 39.7 mm | 40.5 mm |
| Thickness | 13.38 mm | 12.99 mm |
| Lug to lug | 48 mm | 49.64 mm |
| Lug width | 19 mm | 20 mm |
| Crystal | Hesalite-like form, scratch-resistant sapphire crystal with anti-reflective treatment inside | Scratch-resistant sapphire crystal with anti-reflective treatment on both sides |
| Dial | Blue - Grey | Black |
| Clasp | Foldover butterfly clasp with comfort setting | Foldover clasp with comfort setting |
| Calibre | Omega 3861 | OMEGA 9906 |
| Power reserve | 50 hours | 60 hours |
| Movement notes | Listed by OMEGA as a Master Chronometer certified watch. Total product weight approximately 133 g. | Listed by OMEGA as a Master Chronometer certified watch. Total product weight approximately 134 g. |
What is identical
Worth knowing as much as the differences: these are the specifications you cannot use to tell the two apart.
- Water resistance
- 5 bar (50 metres / 165 feet)
- Bracelet
- Steel
- Movement
- Manual-winding
What the differences cost you
Each note below follows from the published figures in the tables above — what they mean for intake, for a listing, and for the handover. Nothing here estimates a price or a margin.
One of these is the harder fit
Lug to lug is 49.6 mm on the 332.10.41.51.01.001 against 48 mm on the 310.30.40.50.06.001 — a 1.6 mm difference across the wrist. Diameter is what buyers ask about; lug to lug is what decides whether a case sits flat or overhangs. Ask for a wrist measurement before shipping the 332.10.41.51.01.001, and put the figure in the listing rather than the diameter alone.
Different movements to verify and to service
The 310.30.40.50.06.001 runs the Omega 3861 and the 332.10.41.51.01.001 the OMEGA 9906. Two consequences at intake: the service history that is normal for one calibre is not evidence about the other, and the calibre is the check that catches a movement swapped into the wrong case. Confirm the movement matches the reference rather than assuming it from the dial.
What to check on each
310.30.40.50.06.001
- Read the crystal specification in full. It is sapphire shaped to resemble hesalite, so it will not polish out like acrylic and it will chip where acrylic would only scuff.
- Do not attempt to buff marks out of the crystal. Hesalite can be polished with a plastic compound and sapphire cannot, and a buyer or a previous owner may have confused the two.
- Expect 50 hours rather than 60. This is the shortest reserve of any OMEGA documented here and it is a manual movement, so a missed morning means a stopped watch.
332.10.41.51.01.001
- Wind it from stopped and pay attention to the feel. This is a manual movement, so your fingers are directly on the barrel and the train, and resistance that is uneven or a stop that arrives early is a real finding.
- Never force the crown past its stop. A manual mainspring has no slipping bridle to protect it, and a previous owner used to automatics may already have tried.
- Note the 60-hour reserve, which is long for a hand-wound chronograph and means a buyer can skip a day without resetting.
Sources
- OMEGA official product page for reference 310.30.40.50.06.001 (Speedmaster First OMEGA in Space Co-Axial Master Chronometer Chronograph 39.7 mm, steel) - Between lugs: 19 mm; Lug-to-lug: 48.00 mm; Thickness: 13.38 mm; Case diameter: 39.7 mm; Case: Steel; Dial color: Blue - Grey; Crystal: Hesalite-like form, scratch-resistant sapphire crystal with anti-reflective treatment inside; Water resistance: 5 bar (50 metres / 165 feet); Total product weight (approx.): 133 g; Caliber: Omega 3861; Movement type: Manual-winding; Power reserve: 50 hours; Bracelet material: Steel; Type of Clasp: Foldover butterfly clasp with comfort setting — retrieved 2026-09-23
- OMEGA official product page for reference 332.10.41.51.01.001 (Speedmaster '57 Co-Axial Master Chronometer Chronograph 40.5 mm, steel) - Between lugs: 20 mm; Lug-to-lug: 49.64 mm; Thickness: 12.99 mm; Case diameter: 40.5 mm; Case: Steel; Dial color: Black; Crystal: Scratch-resistant sapphire crystal with anti-reflective treatment on both sides; Water resistance: 5 bar (50 metres / 165 feet); Total product weight (approx.): 134 g; Caliber: OMEGA 9906; Movement type: Manual-winding; Power reserve: 60 hours; Bracelet material: Steel; Type of Clasp: Foldover clasp with comfort setting — retrieved 2026-09-23
Not affiliated with OMEGA. Specifications are read from each manufacturer's own published documentation on the dates shown and may change; the manufacturer's current documentation governs.