Audemars Piguet Royal Oak Concept GMT Tourbillon Instructions For Use Manual - page 8
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2. A
bout t
he w
atc
h
Eng
lish
Materials
Titanium for the middle-case
The single-piece middle-
case is made of titanium. This
metal is both lightweight
and resistant, making it
the ideal material for an
exceptional watch.
T it anium is al so ver y
corrosion-resist ant and
has thus been used in the
AP case back and folding
buckle.
Chromatised aluminium and ceramics
Borrowed from the automotive and aeronautics
industries, these materials have pride of place in the
Royal Oak Concept GMT Tourbillon.
The bridges are in nickel silver with all-black
galvanic finish and the flange is black-chromatised
aluminium. These anodising processes increase
hardness and improve resistance to friction.
Research work in another field led to the development
of innovative ceramics. For the bezel, crown and
pushpieces, Audemars Piguet selected a ceramic
material with very specific physical properties.
The ceramic has undergone
particularly delicate treatments
calling on all the knowhow of
the Manufac ture’s engineers
and watchmakers. The essential
qualities of this technical ceramic
are its tremendous resistance
to fr iction and wear and its
exceptionally smooth final finish.