IWC Schaffhausen Portofino Hand-Wound Big Date "Bucherer 125 Years"

The IWC Portofino Hand-Wound Big Date "Bucherer 125 Years", reference IW516103, has a 45 mm case in 18-carat 5N gold. Case thickness is 13.1 mm; manual-winding calibre 59230 has a 192-hour power reserve and 30 jewels. Arched-edge sapphire glass covers the silver dial with a large double-digit date display, small hacking seconds and a power reserve indicator. The watch is on a dark brown alligator leather strap by Santoni. Water resistance is rated to 30 metres. A see-through case back displays the movement. The calibre has an operating frequency of 28,800 vibrations per hour.