Master Calendar Meteorite Dial 39mm | Ref. Q1558421 | 2017 Full Set (JLC Service)

The Story

The Jaeger-LeCoultre Master Calendar stands as one of the most revered classical complications in haute horlogerie, carrying the mantle of "The Watchmaker of Watchmakers." Reference Q1558421 elevates this timeless layout with a celestial medium: an authentic dial sliced from the Muonionalusta meteorite. Originating from the asteroid belt between Mars and Jupiter and estimated to be more than 4 billion years old, the meteorite impacted northern Sweden over 800,000 years ago. Because the distinctive crisscross Widmanstätten crystalline structure forms only over millions of years of deep-space cooling, no two dials in existence share the same pattern, rendering every individual timepiece an unrepeatable piece of natural horological art.

The Craft: 39mm Master Geometry & The Manufacture Calibre 866 Engine

The 39mm stainless steel case features refined Master Control proportions with an elegant thickness of just 10.6mm, alternating between satin-brushed case flanks and mirror-polished bezels and step lugs.

The meteorite dial is a balanced mechanical triumph. It features twin aperture windows at 12 o’clock for the day of the week and month, while an outer date ring is tracked by a vibrant blued-steel crescent-tipped pointer hand. At 6 o’clock, a detailed astronomical moonphase aperture sits integrated within the running small seconds subdial, framed by faceted rhodium-plated hour indices and classic dauphine hands.

Turn the watch over to admire the mechanical mastery through the sapphire exhibition caseback: the Manufacture Jaeger-LeCoultre Calibre 866/1. Composed of 305 hand-finished components, this self-winding movement has undergone JLC’s rigorous "1,000 Hours Control" testing. Operating at 28,800 vph with an approximate 43-hour power reserve, it is adorned with Côtes de Genève stripes, circular graining, heat-blued screws, and a 22K gold-rimmed winding rotor.

Condition, Documented 2020 JLC Factory Service & Presentation Set

This collector-grade Meteorite Master Calendar is presented in true Mint condition, showing no notable signs of wear across its stainless steel case flanks, bezel, or dual sapphire crystals. The original black alligator leather strap remains in fresh, crisp condition, secured by an authentic JLC stainless steel folding deployant clasp.

The timepiece arrives as a Complete 2017 Full Set, complete with its original Jaeger-LeCoultre presentation box, outer packaging, operating manual, guarantee certificate dated in 2017, and crucially, the official Jaeger-LeCoultre factory service paperwork documenting a complete overhaul performed in 2020. (Please note: The original calendar-setting stylus pusher is omitted; setting adjusters remain easily operable). Fully inspected and tested on our timing instruments, this rare meteorite grail is backed by our 1-year Honeyrock mechanical warranty.