IWC Schaffhausen Portugieser Eternal Calendar

The IWC Schaffhausen Portugieser Eternal Calendar IW505701 has a platinum case measuring 44.4 mm across. The case stands 14.9 mm thick, and the dial sits under a sapphire crystal. Rated to 50 metres, the case houses the self-winding calibre 52640, an IWC-manufactured movement with a power reserve of 168 hours shown on its own display. The white dial carries a perpetual calendar with date, month, weekday and year, along with a moon phase display and small seconds. A display back reveals the movement construction. The watch is fitted on a black alligator leather strap by Santoni. Lug width measures 22 mm.