Grand Complication movement. Manual winding mechanism. Case: round skeleton back in black rose gold. Dial: Arabic numerals on a day-night window with sword-style hands and day-date display. Bezel: engraved insert featuring a 30-minute counter complication. Crystal: sapphire glass. Three sub-dial chronograph system showing seconds, date, and time functions. Sapphire exhibition caseback revealing the movement details. Screw-down winding crown and two chronograph pushers. Adjustable link bracelet in black rose gold material. Pre-owned condition described as EXCELLENT near-perfect with normal everyday use visible. Item includes original box papers warranty from boutique authenticated by WRIST AFICIONADO watchmakers.