1990s Audemars Piguet Royal Oak Gold / Steel Mid-Size Grey Dial 56303SA Brand_Chopard sigma dials were part of

sigma dials were part of a collaborative effort by Swiss manufacturers to emphasize the use of precious metals

10 with a superb silver dial with black painted hands

but many showcase exquisite sector or silvered designs with applied markers and thin hands

some with only two hands -hour and minute-

The 41mm case houses a sophisticated automatic chronograph movement and features a beautifully balanced grey dial with contrasting sub-dials and gold accents

1990s Audemars Piguet Royal Oak Gold / Steel Mid-Size Grey Dial 56303SA Brand_Chopard sigma dials were part ofA superb condition 1990s Audemars Piguet Royal Oak Mid size 33mm Ultra thin in 18k yellow gold combined with stainless steel reference 56303SA (no date) with a famous "petite tapisserie" superb grey dial with nice patina and matching hands. Designed by the visionary Grald Genta, the Royal Oak was introduced in 1972 and is celebrated for its groundbreaking combination of elegance and sportiness. Genta's design broke traditional watchmaking conventions