You can buy watches like this in Chrono24.

• Mechanical self-winding movement
• Caliber 240 HU
• 24-hour and day/night indication for the 24 time zones
• Dial: charcoal gray lacquered, hand-guilloched, gold applied hour markers
• Alligator strap with square scales, hand-stitched, shiny black, foldover clasp
• Sapphire-crystal case back
• Water resistant to 30 m
• White gold
• Case diameter: 38.5 mm