Mens Breguet Classique Perpetual Calendar Tourbillion #3757 watch, 18kt yellow gold case (40mm diameter, 10.25mm thick), crocodile leather strap, silver engine-turned dial with blue-steeled Breguet hands and black Roman numerals, hour and minutes dial off-centered at 12 o'clock, and small seconds indicator coaxial with the exposed tourbillion cage at 6 o'clock, perpetual calendar with date, day, month, and leap-year indicators, #558QPT caliber 21 jewel manual-winding tourbillion movement, see-through clear sapphire crystal back and front, water resistant to 30 meters.