OMEGA · Speedmaster Dark Side of the Moon and Speedmaster Chronoscope
OMEGA 310.92.44.51.01.004 vs OMEGA 329.30.43.51.03.001
9 published specifications differ between these two, and 4 are identical. Every figure below is what the manufacturer states for that reference; nothing is inferred from the other watch.
What differs
| Specification | OMEGA Dark Side of the Moon, black ceramic, 44.25mm310.92.44.51.01.004 | OMEGA Speedmaster Chronoscope 43mm, blue dial329.30.43.51.03.001 |
|---|---|---|
| Case | Black ceramic, 44.25 mm | Steel, 43 mm |
| Diameter | 44.25 mm | 43 mm |
| Lug to lug | 50 mm | 48.6 mm |
| Dial | Black | Blue |
| Bracelet | Black rubber strap | Steel |
| Clasp | Foldover clasp in ceramic | Foldover clasp with comfort setting |
| Calibre | Omega 9900 | OMEGA 9908 |
| Movement | Self winding | Manual-winding |
| Movement notes | Listed by OMEGA as a Master Chronometer certified watch. Total product weight approximately 108 g. | Listed by OMEGA as a Master Chronometer certified watch. Total product weight approximately 145 g. No case thickness is published on this product page. |
What is identical
Worth knowing as much as the differences: these are the specifications you cannot use to tell the two apart.
- Lug width
- 21 mm
- Water resistance
- 5 bar (50 metres / 165 feet)
- Crystal
- Scratch-resistant sapphire crystal with anti-reflective treatment on both sides
- Power reserve
- 60 hours
Stated for one, not the other
These rows cannot be compared, because one maker publishes the figure and the other does not. An empty cell is a gap in the manufacturer's documentation, not a gap in the watch — and not a licence to fill it in from the other column.
| Thickness | 15.09 mm | not stated |
|---|
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.
Two different ownership conversations
The 310.92.44.51.01.004 is self-winding and the 329.30.43.51.03.001 is hand-wound. That changes what a buyer needs telling at handover, and it changes intake: a hand-wound watch has no rotor to mask a tired mainspring, and a stopped quartz watch is usually a battery rather than a fault.
Different case materials, different handling
The 310.92.44.51.01.004 is ceramic and the 329.30.43.51.03.001 is steel. Different case materials mark, polish and refinish differently, so the condition language that fits one will mislead on the other. Photograph and describe each on its own terms.
Different movements to verify and to service
The 310.92.44.51.01.004 runs the Omega 9900 and the 329.30.43.51.03.001 the OMEGA 9908. 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
310.92.44.51.01.004
- Look for chips, not scratches. Ceramic is far harder than steel and will not abrade, so a case that appears immaculate can still carry a bright conchoidal flake at an edge.
- Inspect the ceramic buckle as carefully as the case. OMEGA specifies the buckle material as ceramic here, and a ceramic clasp that has been dropped is a part you cannot source from a steel donor.
- Accept that nothing on this case can be refinished. There is no polishing a ceramic watch, so any damage you find is permanent and must be disclosed and priced.
329.30.43.51.03.001
- Measure the case height yourself and say that you measured it. OMEGA publishes no thickness for this reference, and borrowing a figure from another Speedmaster is a claim nobody can support.
- Confirm the movement is the manual-winding 9908 rather than one of the self-winding calibres used elsewhere in the collection, since the winding behaviour is completely different.
- Wind it fully and treat the stop as absolute. With no rotor there is no slipping bridle, and forcing the crown past the end of travel is how mainsprings break.
Sources
- OMEGA official product page for reference 310.92.44.51.01.004 (Speedmaster Dark Side of the Moon Co-Axial Master Chronometer Chronograph 44.25 mm, black ceramic) - Between lugs: 21 mm; Lug-to-lug: 50.00 mm; Thickness: 15.09 mm; Case diameter: 44.25 mm; Case: Black ceramic; 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.): 108 g; Caliber: Omega 9900; Movement type: Self winding; Power reserve: 60 hours; Strap color: Black; Strap type: Rubber strap; Buckle type: Foldover clasp; Buckle material: Ceramic — retrieved 2026-09-23
- OMEGA official product page for reference 329.30.43.51.03.001 (Speedmaster Chronoscope Co-Axial Master Chronometer Chronograph 43 mm, steel) - Between lugs: 21 mm; Lug-to-lug: 48.60 mm; Case diameter: 43 mm; Case: Steel; Dial color: Blue; Crystal: Scratch-resistant sapphire crystal with anti-reflective treatment on both sides; Water resistance: 5 bar (50 metres / 165 feet); Total product weight (approx.): 145 g; Caliber: OMEGA 9908; Movement type: Manual-winding; Power reserve: 60 hours; Bracelet material: Steel; Type of Clasp: Foldover clasp with comfort setting; Thickness: not published on this page — 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.