YL IW504402 Portuguese tourbillon reverse series is equipped with order IWC self-made Cal. 51900 fully automatic true tourbillon.

YL IWC IW504402. The current quality closest to the authentic tourbillon watch. Portuguese Tourbillon Reversal Series Equipped with a customized version of Cal. 51900 fully automatic true tourbillon movement, original size: diameter 44.2mm, thickness 15.5mm, front and back double-sided sapphire mirror, achieving the same true function of the original calendar flyback and 3-digit power reserve display.