Patek Philippe 18k Yellow Gold Perpetual Calendar B&P 5040J

An 18k yellow gold perpetual calendar gents wristwatch, silver dial with arabic numbers, automatic movement, sapphire glass, exhibition back, day and 24 hour indicator at 9 0\'clock, month and leap year indicator at 3 0\'clock, moonphase and date indicator at 6 0\'clock, an extra interchangeable 18k yellow gold snap back, brown leather straph with an 18k yellow gold deployant clasp, water resistant to 30m / 100ft, photocopy of an original bill of sale from 1997, last serviced by Patek in June 2011, in excellent condition, comes with an original windingbox and papers dated March 1997