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WATCH
Self-winding mechanical movement. Caliber CH 28‑520 HU. Flyback chronograph. Central chronograph hand. 30-minute counter. World Time. 24-hour and day/night indication for the 24 time zones.
DIAL
Rose-gilt opaline with “carbon” motif, charcoal gray gold applied hour markers with luminescent coating.
CASE
Steel. Sapphire crystal case back. Water-resistant to 30 m. Diameter: 41 mm. Height: 12.75 mm.
BRACELET / STRAP
Calfskin, grained, hand-stitched, taupe (originally fitted). Calfskin, nubuck finish, hand-stitched, beige (additional strap). Fold-over clasp.
CH 28-520 HU
SELF-WINDING
Flyback chronograph. Central chronograph hand. 30-minute counter. World Time. 24-hour and day/night indication for the 24 time zones. Height: 7.97 mm. Number of parts: 343. Jewels: 38. Power-reserve: min. 50 hours – max. 55 hours. Winding rotor: 21K gold central rotor. Balance: Gyromax®. Frequency: 28,800 semi-oscillations/hour (4 Hz). Balance spring: Spiromax®. Hallmark: Patek Philippe Seal. Diameter: 34.5 mm.