21k Gold Central Rotor, Unidirectional Winding, Gyromax Balance, Flat Balance Spring. Corrector Buttons between 11 and 12 for simultaneous day and date correction; between 3 and 4 for month correction; between 5 and 6 for moon-phase correction; between 6 and 7 for separate day correction. Included with package is correction stylus in ebony and 18k white gold.Silvery Opaline Dial also features railway-track minute scale and minutes indicated in blue from 5 to 60. Pear-shaped hour and minute hands in black oxidized gold. Arrow-style retrograde date hand in black nickel-plated gold with red painted tip. Counterbalanced black oxidized seconds hand.