The classic Portugieser Perpetual Calendar (Ref. 5033) with a 44-millimetre diameter displays the calendar information on four subdials. In addition to the displays for the date, day, month and moon phase, it features a four-digit year display, small seconds and a power reserve display. Newly available is a Boutique Edition with maritime-inspired design cues, an 18-carat Armor Gold® case, a blue dial and a blue alligator leather strap by Santoni. Ref. IW503312 Boutique Edition: 18-carat Armor Gold® case, blue dial, gold-plated hands, 18-carat gold appliques, blue alligator leather strap by Santoni. The timepiece is powered by the IWC-manufactured 52610 calibre, which features a bidirectional Pellaton winding system fitted with components made of virtually wearfree zirconium oxide ceramic. Two barrels build up a power reserve of seven days.