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Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →The Louis Moinet Speed of Sound (reference LM-130.20.50) pairs a restored, modified Valjoux 88 chronograph with a contemporary Grade 5 titanium case, a telemeter scale and an unusual lunar display incorporating meteorite. Monochrome Watches reported a 20-piece edition and a CHF 50,000 price in 2024; neither figure establishes current pricing or availability.
What is the Louis Moinet Speed of Sound?
It is a limited-edition anniversary chronograph built around a vintage Valjoux 88 movement. Louis Moinet created the model for the brand’s 20th anniversary, combining the historic calibre with a modern case and a redesigned moon display. The reference is LM-130.20.50, and Monochrome Watches reported production of 20 pieces in 2024.
Louis Moinet describes itself as an independent Swiss watch brand based in Saint-Blaise, specializing in high-end watches that often use unusual materials and technology. Its official profile says the collection consists of limited editions or unique pieces (Louis Moinet brand profile). The watch was designed by Jean-Marie Schaller and manufactured by Les Ateliers Louis Moinet in Saint-Blaise, according to the Chicago Athenaeum’s award entry (Chicago Athenaeum award entry).
What does the Valjoux 88 do in this watch?
The Valjoux 88 was originally a hand-wound chronograph calibre combining a moonphase and triple-calendar indications. Fratello dates its production to approximately 1947–1974. In the Speed of Sound, Louis Moinet removed the calendar indications and 12-hour chronograph counter, leaving a simplified display suited to the new dial. The movement is decorated and visible through the sapphire caseback, with hand-engraved gold bridges, as described by Monochrome Watches (Monochrome Watches; Fratello).
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#1 Best Overall
- Case Size: 41.00 mm, Band Width: 20, Case Thickness: 14.19 mm
- Automatic movement, 316L stainless steel case, Index dial type
- Stainless steel bracelet, interchangeable quick release bracelet,butterfly clasp with push-buttons closure
- Water-resistant up to a pressure of 10 bar (100 m / 330 ft): suitable for short periods of recreational swimming and showering, but no diving or snorkeling.
- 2 Year International Warranty
Louis Moinet’s 2024 press material states that 13,218 Valjoux 88 movements were made between 1947 and 1974. That is the brand’s production figure, rather than an independently verified ledger (Louis Moinet press release).
Published power-reserve specifications conflict: Monochrome lists 40 hours, while Fratello lists 48. Without a confirming maker specification, it is better not to treat either figure as settled.
How does the telemeter scale work?
A telemeter estimates distance by measuring the interval between a visible event and the sound it produces. For the familiar storm example, start the chronograph when lightning flashes and stop it when the thunder arrives. The elapsed time can then be read against the watch’s telemeter scale as an approximate distance.
Rank #2
- Men's luxury timepieces with technical advancements and a sporty style
- 1/5 Second Chronograph Measures up to 60 Minutes, 12/24 Hour Time, Date
- Silver-Tone Stainless Steel
- Spherical Mineral Crystal
- 100 Meters Water Resistant and 5 Year Limited Warranty
This is a traditional chronograph use, not a claim that the Speed of Sound is a precision weather instrument or a safety device. Monochrome identifies the perimeter scale as a telemeter (Monochrome Watches).
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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitchesWhat makes the moon display unusual?
The moon indication uses a slightly domed disc with a hand-drawn luminous lunar motif. A piece of Dhofar 457, a lunar meteorite, is set on that same disc. The Chicago Athenaeum describes the fragment as symbolizing the full moon and says the lunar motif was painted by hand with luminescent paint (Chicago Athenaeum award entry).
That combination makes the display more than a conventional printed moonphase: it places a documented design element and a meteorite fragment together on the indication. The award entry’s description establishes the design intent; it does not provide independent provenance documentation for the meteorite fragment.
Rank #3
- 【Automatic Watch for Men Chronograph Wristwatch】Men's watches features crafted from premium Stainless steel material(available in Gold and Silver, diameter;41MM,thick;12MM ) and finished with alternating polishing and brushing techniques, resulting in a refined luster and durable texture. The dial is available in a variety of colors (Green, Blue, Sky Blue, Black, White, Gold, and Grey), while the stainless steel bracelet (wide;20MM ) exudes classic elegance without sacrificing a sporty feel
- 【Excellent Mechanical Automatic winding movement 】Equipped with a high-precision balance wheel, the meticulously tuned movement ensures accurate and stable timekeeping, sensitively sensing the wearer's subtle wrist movements and converting them into rotational power. A smooth winding mechanism guarantees a continuous and stable power reserve. Furthermore, it features a stop-seconds function (the seconds hand stops immediately when the crown is pulled out), allowing for precise time adjustment.
- 【Multifunctional Men Wrist Watch With Small Dial Design】The dial features a delicate sunburst and meteorite finish. enhancing visual depth. Each watch is equipped with independent windows for the day, month, 24-hour format, and date, arranged clearly and logically. It complements formal attire, business casual, and everyday wear with ease, making it an ideal choice for travel and daily wear. It helps you manage your time efficiently and exudes elegant style.
- 【Fixed Chronograph Bezel - Tachymeter Bezel】The chronograph bezel is a signature design element of racing-themed chronographs, blending sportiness, retro charm, and engineering aesthetics. It cleverly utilizes mathematical principles to transform speed calculations, which previously required cumbersome formulas, into intuitive pointer readings, perfectly embodying the harmonious integration of function and design, and fully showcasing the practicality and fun of mechanical watches.
- 【Waterproof watch and Luminous 】This watch boasts a 3 ATM (30 meters) water resistance rating, easily handling everyday splashes such as handwashing and face washing. A carefully designed luminescent coating ensures clear readability even in low-light conditions, allowing for quick and easy timekeeping.
What are the case and dial specifications?
| Specification | Published detail |
|---|---|
| Reference | LM-130.20.50 |
| Case | 40.7 mm diameter, Grade 5 titanium |
| Crystal | Sapphire, front and caseback |
| Water resistance | 30 m |
| Movement | Modified, hand-wound Valjoux 88; 17 jewels |
| Displays | Hours and minutes, small seconds, 30-minute chronograph counter, moon display |
| Strap | Black alligator |
These specifications are reported by Monochrome Watches (full model coverage). Its description of the dial notes a black, textile-like hand-guilloché surface, red-gold-framed subdials, meteorite inserts in the chronograph and seconds counters, applied indices, and openworked hands with luminous tips. Those are publication descriptions, not results of independent handling or testing.
How much does the Speed of Sound cost?
Monochrome Watches reported a price of CHF 50,000 in September 2024 (Monochrome Watches). This is a dated publication figure, not a current quote. Current retail stock, resale prices and exact-reference listings have not been established, so prospective buyers should confirm price, availability, condition and documentation directly with a seller.
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How should a collector assess it?
The Speed of Sound’s appeal rests on the combination of a historic, hand-wound movement and a distinctive modern execution. Before considering one, a collector would want to verify:
- Movement provenance and service history: confirm that the Valjoux 88 is present and ask for records of its restoration or servicing.
- Modification details: establish which original complications were removed and how the remaining chronograph and moon display function.
- Condition and legibility: inspect the dial, meteorite elements, hands, case and chronograph operation in person or through detailed documentation.
- Materials and documentation: request evidence supporting the case and meteorite descriptions.
- Scarcity and price: verify the exact reference and edition details, then compare the asking price with current condition and seller documentation rather than relying on a 2024 price report.
- Serviceability: discuss access to qualified service for the vintage calibre and the watch’s modified complications.
Louis Moinet’s official historical account says its Compteur de Tierces was completed in 1816 and describes Louis Moinet as the inventor of the chronograph (Louis Moinet history). That is the brand’s own account of its history; the Speed of Sound’s more immediate distinction is the way it puts a modified vintage chronograph at the center of a contemporary, meteorite-accented design.
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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.
