Portuguese Perpetual Calendar fullset + revision - Ref IW502218 White gold case on brown nubuk bracelet with IWC folding clasp, dolphin gray dial, sapphire crystal and back, automatic movement caliber 51610 SCAFUSA, power reserve, complete calendar with day, month, date, year and moon phase, module present, delivered with IWC box and papers and IWC service in 2017. Very very nice piece for the discerning connoisseur!!!