H. Moser & Cie. Mayu Marrone Diamonds

This jewellery version of the Mayu Marrone features a light-reflecting brown dial and a bezel set with brilliant-cut diamonds. The watch is available in two different designs. One has a light brown dial with a special sun pattern ground finish which coordinates perfectly with the warm golden tones of the rose gold case. The other, ca white gold design, contrasts a dark brown dial with a gleaming white case.

The Moser movement HMC 321.503, visible through the sapphire glass back, is an extra-long-running manual winding mechanism with a power reserve display on the back. A large barrel guarantees a power reserve of 80 hours, which ensures that the watch will continue to run for at least three days after being fully wound.
True bevel wheels in the winding system assure smooth, low-wear operation. Cut-off and polished edges, a sun pattern ground finish on the plate and bridges, as well as the Moser ground stripes, emphasize the intrinsic value of this manufactory movement, which is engraved with the Moser seal, a symbol of quality and authenticity for 185 years.

The accuracy of the Mayu movement, 32 mm in diameter, is ensured by the Straumann Hairspring, produced by Moser at its premises in Neuhausen, and the stabilized Breguet overcoil. The design of the pallet fork and escapement wheel crafted in hardened solid gold, housed in Moser’s characteristic interchangeable escapement module, is also exclusive and unique.

Moser’s distinctive satin-finished and polished case surfaces and bevel set with 64 Top Wesselton brilliant-cut diamonds characterize the gold case, which measures 38.8 mm in diameter. The harmonious design of the dial is particularly enhanced by the rare, large pocket watch seconds hand. Modelled on the historic pocket watches from H. Moser & Cie, the lower end of this subsidiary seconds display sits as close as possible to the minute ring. This position can only be achieved with a large movement designed specifically for the purpose without a movement retaining ring.

Movement
Hand-wound calibre HMC 321.503, with true bevel wheels
Manufactured mechanical
No movement holding ring
Diameter: 32.00 mm
Height: 4.80 mm
Number of jewels: 27
Frequency: 18’000 vibrations per hour
Power reserve of at least 3 days
Adjustment 6 positions
Power reserve display on the movement side
Hacking second
Moser tooth system in wheel train and pinions
Moser interchangeable escapement
Original Straumann Hairspring® with stabilized Breguet overcoil
Pallet fork and escapement wheel made of hardened solid gold

Reference No. 321.503-B15 ( Model in 18ct. rose gold)
Case
18ct. rose gold, three-part, round case
Graining and polished finish
Bezel set with 64 brilliant-cut diamonds
Diameter 38.80 mm
Height 9.30 mm
Gold crown with «M» sign 5.50 mm
Sapphire crystal with internal antireflective coating
See-through cambered sapphire glass back

Dial & hands
Light brown dial with sun pattern ground finish with diamond polished indexes
Hours, minutes, off-centred pocket watch size second with three-dimensional form hands with a
bright-polished eye

Strap and buckle
Hand-sewn dark brown alligator leather strap
Solid 18ct. rose gold buckle with Moser logo

Reference No. 321.503-B16 ( Model in 18ct. white gold)
Case
18ct. white gold, three-part, round case
Graining and polished finish
Bezel set with 64 brilliant-cut diamonds
Diameter 38.80 mm
Height 9.30 mm
Gold crown with «M» sign 5.50 mm
Sapphire crystal with internal antireflective coating
See-through cambered sapphire glass back

Dial & Hands
Dark brown dial with sun pattern ground finish with diamond polished indexes
Hours, minutes, off-centred pocket watch size second with three-dimensional form hands with a bright-polished eye

Strap and buckle
Hand-sewn dark brown alligator leather strap
Solid 18ct. white gold buckle with Moser logo

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