IWC Big Pilot Perpetual Calendar 'Boutique London' IW502805 Limited Edition, #33 of only 38 worldwide Case: 46mm stainless steel Caseback: Exhibition, sapphire Crystal: Sapphire Movement: 51613 Power Reserve: 7 days / 168 hours The IWC Big Pilot’s Watch Perpetual Calendar “Boutique London” (ref. IW502805) is a 46 mm stainless-steel limited edition of 38 pieces created for the opening of IWC’s London boutique on New Bond Street. It features a sunburst slate-grey dial with the signature four‑register perpetual calendar layout (day, date, month, year and moon phase), powered by a 7‑day automatic movement and paired with a blue alligator strap, combining the classic Big Pilot aesthetic with a highly technical grand complication in a boutique‑only configuration.