Jaeger-LeCoultre Master Control Chronomètre Perpetual Calendar — short spec
Short overview, not a review. Pros and cons restate published facts only. No buying advice. Numbers not shown on a source we opened are omitted or marked unpublished.
Jaeger-LeCoultre’s Master Control Chronomètre Perpetual Calendar, reference Q4178180, is a 39 mm steel watch, 9.2 mm thick, on an integrated steel bracelet. Calibre 868 is a perpetual calendar with the moon at 6, 70 hours, 4 Hz (28,800 vph), COSC (a Swiss chronometer certificate), and HPG (a test of the finished, cased watch). The Singapore page lists S$64,000, price including taxes, and Watch Advice lists 44 mm lug-to-lug (third-party).
Verified specs
| Item | Published | Source |
|---|---|---|
| Reference | Q4178180 / JLQ4178180, steel | Jaeger-LeCoultre Singapore product page |
| Case | 39 mm wide, 9.2 mm thick; integrated steel bracelet; “dedicated winter/summer adjustment”; water resistance 5 bar | Jaeger-LeCoultre Singapore product page |
| Lug-to-lug | 44 mm (third-party). The Jaeger-LeCoultre product page does not list lug-to-lug. | Watch Advice, Sameera Gamage, 22 September 2026 (third-party) |
| Dial | Blue-grey gradient sunray. Jaeger-LeCoultre calls the moon both “hammered gold leaf” and “a hammered platinum leaf moon”. | Jaeger-LeCoultre Singapore product page |
| Movement | Calibre 868; 70 hours; 4 Hz and 28,800 vph; movement thickness 4.72 mm; 332 components; 46 jewels; movement diameter 28 mm; COSC (a Swiss chronometer certificate); HPG (a test of the finished, cased watch) | Jaeger-LeCoultre Singapore product page |
| Pink gold | Watch Advice lists reference Q417216J. “Price available upon request”. | Watch Advice · Jaeger-LeCoultre Singapore product page |
| Singapore price | S$64,000. Price including taxes. | Jaeger-LeCoultre Singapore product page |
Fit on 6–7 in wrists (6.5 in reference)
Fit: Moderate risk on a 6.5 in wrist. The 44 mm lug-to-lug is Watch Advice’s figure (third-party). The 39 mm diameter and the 9.2 mm thickness are Jaeger-LeCoultre’s figures. The product page does not list lug-to-lug.
The flat top of the wrist (usable span) is the width a watch can sit on without its lugs hanging over the edge.
| Wrist (approx.) | Watch Advice lug to lug | Thickness | Fit note |
|---|---|---|---|
| 6.0 in (152 mm) | 44 mm (third-party) | 9.2 mm | Moderate risk: 44 mm is close to the flat top of a 6 in wrist (44.63 mm before rounding). |
| 6.5 in (165 mm) — reference | 44 mm (third-party) | 9.2 mm | Moderate risk: 44 mm is just over 90% of the flat top of a 6.5 in wrist (about 48.3 mm). |
| 7.0 in (178 mm) | 44 mm (third-party) | 9.2 mm | Low risk: 44 mm is under 90% of the flat top of a 7 in wrist (about 52.1 mm). |
Short overview
Pros (from published facts)
- 39 mm case and 9.2 mm thick.
- Calibre 868, 70 hours, COSC and HPG.
- Singapore page lists S$64,000, price including taxes.
Singapore note
The authorised dealers guide lists Jaeger-LeCoultre boutiques at ION Orchard, Marina Bay Sands, and Sentosa, and The Hour Glass (VivoCity). The Singapore product page lists +65 3158 3178 and S$64,000, price including taxes. Watches are not subject to customs duty in the usual consumer path (see Buying in Singapore).