The watch is a full set, with box and papers, dated 2017. It shows minor signs of wear.

Model & Reference:
Reference: 5930G-010
Nicknamed “Beijing” (due to the city ring configuration)

Case & Materials:
Case material: 18k white gold
Diameter: ~39.5 mm
Thickness/Height: ~12.86 mm (as per technical specs)
Crystal: Sapphire crystal (on front)
Caseback: Transparent sapphire case back (display back)
Water Resistance: 30 m (≈ 3 ATM)

Dial & Hands:
Dial color: Blue, with a guilloché (engine-turned) center
Hour markers: Applied white-gold baton (stick) markers
Hands: Dauphine-style (white gold)
Features: 24-city world-time ring, 24-hour ring (day/night indication)
Subdial: 30-minute chronograph counter (at 6 o’clock) with a white-gold surround

Movement:
Movement: Automatic — Caliber CH 28-520 HU
Jewels: 38 jewels
Frequency: 28,800 vph
Power reserve: ~ 55 hours (varies by source)
Chronograph: Column-wheel chronograph, flyback function
Balance/regulation: Gyromax balance; Spiromax balance spring (Silinvar)

Strap / Bracelet:
Strap: Hand-stitched navy blue leather (large square scales)
Clasp: White-gold (or 18k WG) fold-over (Calatrava-style) clasp

Functions / Complications:
Local time (hours, minutes)
World time (24 time zones/cities)
24-hour day/night indicator
Flyback Chronograph (with central seconds + 30-min counter)