Girard Perregaux 49538 1966 Annual Calendar Equation of Time 49538 52 131 bk6a 4953852131bk6a 49538.52.131.bk6a, 18k rose gold on a strap with an 18k rose gold tang buckle, automatic GP caliber GP0300-0010 movement, 46 hour power reserve, silver dial with a combination of applied rose gold and black printed hour markers, rose gold leaf-shaped hands, blued steel hands for the complications, small seconds at 9 o'clock, annual calendar with date and month, equation of time indicator at 4:30 with shows the difference betwen "true solar time" and "mean solar time," display back, sapphire crystal, diameter: 40mm, thickness: 10.72mm, water resistant to 30 meters, Excellent condition but watch