Portugieser Hand-Wound Tourbillon Day & Night Armor Gold / Black

In Context

At 42.4 mm it is sized to the current mainstream: 40 mm is the median across every watch measured in this catalogue. At 10.8 mm thick it is about average for a modern wristwatch. The case back is open, so the movement is visible without taking the watch apart, and the sapphire crystal will resist everything short of deliberate abuse. 60 m covers rain and hand-washing comfortably; it is not a watch to swim in.

The movement is hand-wound, so winding it becomes part of the day rather than something the watch does for you. 84 hours of reserve puts it well past a weekend — several days off the wrist and it is still going. At 28,800 vph the seconds hand advances 8 times a second.

IW5459-01 stands on its own in this catalogue — no other reference here shares its base number. It pairs a black sunburst dial with a armor gold case. Beyond the time it carries a tourbillon.

81925 Calibre IWC-manufactured movement Manual-winding 84 hours Power Reserve Frequency 28'800 VPH (4 Hz) 195 Components 22 Jewels Flying minute tourbillon Day & Night display Hacking tourbillon mechanism