IWC Watch Portugieser Perpetual Calendar 44 Silver Moon
IWC Watch Portugieser Perpetual Calendar 44 Silver Moon IW503701. Over the last two decades, the Portugieser Perpetual Calendar has established itself as a key pillar of the collection. Originally developed by IWC Schaffhausen’s former Head Watchmaker Kurt Klaus in the 1980s, the perpetual calendar complication has been continuously improved and perfected over the years. The first Portugieser with a perpetual calendar was launched in 2003.