The Omega Speedmaster Grey Side of the Moon “Meteorite” is reference 311.63.44.51.99.001: a grey ceramic Speedmaster with a meteorite dial and automatic Calibre 9300. It is not the later Speedmaster Moonphase Meteorite, a separate 43 mm steel model with a dual-hemisphere moonphase display and manual-winding Calibre 9914.
What is the Grey Side of the Moon “Meteorite”?
It is the earlier Grey Side of the Moon meteorite-dial variant, identified by Omega’s regional product page and an authorized retailer under reference 311.63.44.51.99.001. The model combines the Grey Side collection’s ceramic case and chronograph format with a grey meteorite dial. Omega’s regional page describes the meteorite-dial version and the collection’s Calibre 9300; an exact-reference listing supplies further specifications. Omega’s regional product page and the retailer listing identify the watch.
Specifications for reference 311.63.44.51.99.001
The following details are retailer-published specifications for this exact reference. Omega’s regional page independently describes the collection’s Calibre 9300, column-wheel chronograph, Co-Axial escapement and 60-hour power reserve; verify the individual watch’s documentation for a complete specification set.
| Specification | Published detail |
|---|---|
| Reference | 311.63.44.51.99.001 |
| Case | 44.25 mm grey ceramic |
| Dial | Grey meteorite |
| Movement | Self-winding Omega Calibre 9300 |
| Strap | Leather strap with folding clasp |
| Water resistance | 5 bar (50 m); this rating is not, by itself, a recommendation for swimming or diving |
What the meteorite dial and Grey Side styling mean
The defining visual pairing is the grey meteorite dial against a grey ceramic case. Omega’s product content identifies the meteorite treatment, but the cited information does not establish the dial material’s source, age, or whether every dial has a unique pattern. Those details should not be inferred from the word “meteorite” alone.
#1 Best Overall
- Model 310.32.42.50.01.001
The “Grey Side” name belongs to Omega’s broader lunar-themed Dark/Grey Side Speedmaster family. In a 14 October 2025 announcement about an Apollo 8 commemorative model, Swatch Group quoted astronaut Jim Lovell saying that “the Moon is essentially grey.” That quote is collection-story context, not a statement about, or endorsement of, reference 311.63.44.51.99.001. Swatch Group’s announcement provides that context.
How it differs from the 2025 Moonphase Meteorite
The similar names can cause confusion, but these are distinct Speedmaster models, not variants of one reference. Swatch Group announced the Moonphase Meteorite collection on 14 January 2025. Its published features differ substantially from the earlier Grey Side meteorite reference:
Rank #2
- Stainless steel case
- Black dial
- Swiss-automatic movement
- Case diameter: 40mm
- Water resistant to 330 feet
| Feature | Grey Side of the Moon “Meteorite” | Moonphase Meteorite (announced 2025) |
|---|---|---|
| Reference or family | 311.63.44.51.99.001 | Separate 43 mm stainless-steel collection; no single reference stated here |
| Case | 44.25 mm grey ceramic, per the exact-reference retailer listing | 43 mm stainless steel, per Swatch Group’s announcement |
| Movement | Self-winding Omega Calibre 9300, per retailer; Omega describes 60 hours of power reserve for the Grey Side collection | Manual-winding Calibre 9914 |
| Distinctive feature | Grey meteorite dial and chronograph | Dual-hemisphere moonphase display and two cabochons made from lunar meteorite |
| Strap or bracelet | Leather strap with folding clasp, per retailer | Not stated in the cited announcement |
| Water resistance | 5 bar (50 m), per retailer | Not stated in the cited announcement |
| Price and availability | A Canadian retailer snapshot showed CAD $24,500 and “Out of Stock”; this is not a current universal price | Not stated in the cited announcement |
The Moonphase Meteorite’s design and movement details come from Swatch Group’s 14 January 2025 announcement. Its features should not be attributed to the Grey Side reference.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Price and what to confirm when buying
A retailer listing for the exact reference showed CAD $24,500 and “Out of Stock” when crawled roughly two months before this article’s research date. That is a dated snapshot from one Canadian retailer, not a current quote, a universal retail price, or a valuation of the watch. Stock and pricing can change.
Rank #3
- Rubber
- Rotating bezel, gmt
- Automatic-self-wind movement
- Case diameter: 40mm
- Water resistant to 330 feet
When considering a listing, confirm that it is specifically reference 311.63.44.51.99.001, then check the watch’s condition, included box and papers, warranty terms, seller authorization, and current availability directly with the seller. A listing for the Moonphase Meteorite or another Grey Side model is not interchangeable just because its name is similar.
Quick Recap
Best Value
- Excellent condition - Minimal signs of wear consistent with pre-owned use.
- Wrist Size (in): 7.25, Case Height (mm): 14.00, Case Width (mm): 43.00
- This item is pre-owned and may show light signs of wear. Please refer to the condition and photos.
- Comes with a myGemma Certificate Of Authenticity.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
