The IWC Portugieser Eternal Calendar Replica is about to make the secular calendar much less niche – good news (or is it bad news?) for fans of super-accurate perpetual calendar watches. Before IWC crashed the party, the secular calendar complication was only found in fewer than half a dozen watch references that were either extremely expensive or absurdly rare, or both. Think Patek Philippe Calibre 89 or the Franck Muller Aeternitas Mega 4. The Portugieser Eternal Calendar is not a limited edition timepiece. Its price tag is the only limiting factor, clocking in at CHF150,000. At first glance, the price would seem high for a watch whose finishing is more industrial than artisanal. But it’s important to note that integrating the secular calendar module and changing the gearing for the moon phase are no simple tasks. There’s also economics at play: the Portugieser Eternal Calendar is the first truly ‘accessible’ wristwatch with a secular calendar complication and a bonus moon phase indicator of record-breaking accuracy. There is really no competition around (yet) to warrant an aggressive pricing strategy – and that’s perfectly fine.