Jaeger-LeCoultre Master Calendar

Master Calendar is a wristwatch by Jaeger-LeCoultre.

This model in the series Master Control has a hand date display, a day and month window, a highly accurate moon phase, and power reserve indicator.

References

Jaeger-LeCoultre has produced many different Master Calendar watches to date.

• Case number 140, 37 mm diameter
  • Master Moon: 891/448 or 891/2/440 - steel (140.8.98), red gold (140.2.98)
  • Master Control Calendar: Cal. 891/977 or 891/447 - steel (140.8.87), white gold (140.3.87), yellow gold (140.1.87)
• Case number 147, 40 mm diameter
  • Master Calendar: Cal. 924 - steel (147.8.41), rose gold (147.2.41)
• Ref. 151, 40 mm diameter
  • Master Calendar, Ref. 151 (20xx-2013): Cal. 924 - steel (Q151842A), rose gold (Q151242A)
• Ref. 155, 39 mm diameter
  • Master Calendar, Ref. 155 (2014-): Cal. 866 - steel (Q1558420), steel/meteorite dial (Q1558421), rose gold (Q1552520), rose gold/meteorite dial (Q1552540)
• Ref. 126, 39 mm diameter
  • Master Ultra Thin Calendar, Ref. 126 (2013-): Cal. 891/2-448 - steel (Q1263520)

Movement: Self-winding manufacture movement JLC 924, 28,800 A/h 43 hours power reserve 339 components 41 jewels Case: 18ct red gold or stainless steel Ø 40.5 mm, H 13 mm Domed sapphire crystal with anti-glare treatment Sapphire crystal caseback Waterproof to 50 m Dial: Silvered Steel version: solar grinding, rhodinated indexes Functions: Hours, minutes, small seconds Hand date, day of week, month Moon phase with total precision over a period of 122 years Power reserve Bracelet: Brown Alligator leather strap with double folding clasp or stainless steel bracelet