You can buy watches like this in Chrono24.

• Movement: Perpetual, mechanical chronograph, self-winding
• Crystal: Scratch-resistant sapphire
• Material: Rolex always uses 950 platinum, an alloy consisting of 950‰ (thousandths) platinum
• Winding: Bidirectional self-winding via Perpetual rotor
• Waterproof to 100 metres / 330 feet