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The Omega Speedmaster Moonphase 304.30.43.52.01.001 and Jaeger-LeCoultre Master Control Calendar Q4148120 both display the moonphase, but they are built around different priorities. The 43 mm Omega is a hand-wound chronograph with a date; the 40 mm JLC is an automatic complete-calendar watch with day, date and month indications. “Master Control” is a collection, not one watch, so this comparison applies specifically to reference Q4148120.
At a glance: two moonphase watches with different jobs
| Specification | Omega Speedmaster Moonphase 304.30.43.52.01.001 | Jaeger-LeCoultre Master Control Calendar Q4148120 |
|---|---|---|
| Case | Stainless steel; 43 mm diameter; 13.61 mm thick | Stainless steel; 40 mm diameter; 10.95 mm thick |
| Movement and winding | Calibre 9914; hand-wound | Calibre 866; automatic |
| Stated power reserve | 60 hours | 70 hours |
| Calendar and timing functions | Chronograph, date and moonphase | Day, date, month, seconds and moonphase |
| Water resistance | 5 bar / 50 m | 5 bar |
| Certification and magnetic resistance stated on the cited product page | METAS Master Chronometer certification; 15,000-gauss resistance claim | No directly comparable certification or gauss figure stated |
| Bracelet or strap listed | Steel bracelet | Steel bracelet and light-brown Novonappa calfskin strap included |
These are manufacturer-listed specifications, not results from a comparative test. The dimensions describe a measurable difference, but cannot establish how either case will feel on a particular wrist.
| # | Preview | Product | Price | |
|---|---|---|---|---|
| 1 |
|
Omega Speedmaster Moonwatch 304.33.44.52.03.001 | $12,499.00 | Buy on Amazon |
| 2 |
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Omega Speedmaster Moonphase Automatic Men's Watch 304.23.44.52.06.001 | $16,300.00 | Buy on Amazon |
| 3 |
|
Omega Speedmaster Moon Phase Chronograph Automatic Men's Watch 304.33.44.52.03.001 | $12,499.00 | Buy on Amazon |
| 4 |
|
REBANDACE Strap for Omega x Swatch MoonSwatch Watch 20mm,Folding Buckle Band Compatible Moonswatch... | $23.99 | Buy on Amazon |
| 5 |
|
Omega | $8,142.00 | Buy on Amazon |
What each watch’s complications are for
Omega: moonphase with a chronograph
Omega pairs the moonphase with a chronograph and date on this reference. Its calibre 9914 is a hand-wound Co-Axial column-wheel chronograph. Choose this layout if timing functions are part of what you want from the watch, rather than a full calendar display.
Omega says the moonphase mechanism needs adjustment once every 122 years. That is the manufacturer’s stated interval, not an independently verified performance result.
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#1 Best Overall
- Model 304.33.44.52.03.001
JLC: moonphase with a complete calendar
The Q4148120 puts the moonphase alongside day, date and month indications, plus seconds. Its distinguishing calendar detail is a jumping date: Jaeger-LeCoultre says the date hand crosses between the 15th and 16th to avoid obscuring the moonphase display.
Case size, winding and reserve
The Omega measures 43 mm across and 13.61 mm thick; its official page also lists a 48.60 mm lug-to-lug measurement and 21 mm lug width. The JLC measures 40 mm across and 10.95 mm thick. The Omega is therefore larger and thicker on paper, while the JLC is more compact by those two measurements. Try each on if fit is decisive: dimensions alone do not predict comfort.
The winding experience differs too. Omega’s selected reference uses a manually wound calibre 9914 and has a stated 60-hour reserve. The JLC uses automatic calibre 866 and has a stated 70-hour reserve. These reserve figures describe manufacturer specifications; they do not by themselves establish comparative accuracy or everyday performance. Other Speedmaster Moonphase references use different calibres, so the 9914 details should not be generalized to the entire collection.
Water resistance, certification and magnetic resistance
Omega lists 5 bar, or 50 m, water resistance for reference 304.30.43.52.01.001; JLC lists 5 bar for Q4148120. These are manufacturer ratings, not a recommendation to use either watch for a particular water activity.
Rank #3
- Model 304.33.44.52.03.001
Omega explicitly states that this Speedmaster is METAS-certified as a Master Chronometer and claims resistance to 15,000 gauss. The cited JLC product page does not provide a directly comparable certification or magnetic-resistance figure. That difference is a difference in published claims, not proof that one watch performs better in daily use: the available specifications do not constitute a head-to-head accuracy or magnetism test.
Bracelet, strap and availability
The cited Omega reference page lists a steel bracelet. Jaeger-LeCoultre says Q4148120 comes with both a steel bracelet and a light-brown Novonappa calfskin strap. Those inclusions apply to this specific JLC reference and should not be assumed for other Master Control models.
Rank #4
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Current prices, local taxes, discounts and live inventory are not established here; they vary by market, date and retailer. Check with a local authorized retailer for a current quote and availability rather than treating a product page as confirmation that a watch is in stock.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Which one should you choose?
- Choose the Omega for its complication mix if you want a chronograph alongside the date and moonphase, and prefer a hand-wound movement.
- Choose the JLC for its calendar mix if day, date and month indications matter more than a chronograph, or if you prefer automatic winding.
- Compare them on wrist if case proportions are central to the decision. Their listed diameters and thicknesses differ, but personal fit cannot be concluded from those figures alone.
- Compare the specific references, not collection names. “Master Control” covers multiple models, while Omega’s Moonphase line includes variants with different movements and specifications.
Omega dates the Master Control collection to 1992 in the heritage section of its Q4148120 product page. That collection history does not make the selected model’s specifications interchangeable with those of other Master Control watches.
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Best Value
- Model 310.30.42.50.01.002
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.
