IWC Schaffhausen Portugieser Perpetual Calendar Tourbillon Edition "150 Years"

The IWC Portugieser Perpetual Calendar Tourbillon Edition "150 Years", reference IW504501, has a 45 mm case in 18-carat 5N gold. This special edition has a perpetual calendar and a flying minute tourbillon. The case has a thickness of 15.2 mm. Calibre 51950 is self-winding and has a 168-hour power reserve and 54 jewels. The white dial has a day and date display, a power reserve indicator and a moon phase display beneath arched-edge sapphire glass. The watch is on a black alligator leather strap by Santoni. A water-resistance rating of 30 metres applies to the case. The movement's operating frequency is 19,800 vibrations per hour.