Master Date and Master Moon has always been a little redundant, while some prefer one over another, it is probably superflous to have both in the Master Range.

(Master Calendar, Pink Gold Version)
With a new Master Control Update this year, the Master Calendar will be replacing the current Master Date and Master Moon series with an elegant Power Reserve Indicator:

(Master Calendar, Stainless Steel Version)
Movement:
- Mechanical automatic movement, JLC cal 924, crafted and decorated by hand
- 28,800 vph
- 45-hour power reserve
- 339 parts
- 41 jewels
- 6.5mm high
- oscillating weight segment in 22-carat gold
Functions:
- hours, minute
- small second hand
- date, day, month, moonphases
- power reserve
Dial:
- silvered sunray-patterned, numerals and hour-markers in applied gilt or rhodium-plated gold, 3 luminescent dots
Hands:
- hour and minutes, alpha in gilt or rhodium-plated brass
- others, gilt or rhodium-plated brass, blue varnish
crown:
- 1 crown to start the watch and set the hours and minutes
- 3 correctors for the calendar
Case:
- 40mm diameter, in stainless steel or in 18-carat Pink Gold
- sapphire crystal, hardness No.9
- sapphire-crystal caseback revealing the movement
- water resistant to 50m
straps:
- leather matt brown or matt chocolat alligator 20/26 and 16mm in stainless steel or 18 carat pink gold folding clasp
- metal bracelet for Stainless Steel version only, patented five-link double-axis, with an exclusive JLC fast length change clasp allowing fine adjustment of up to 4mm on either side.
Jaw