IWC Schaffhausen – Ingenieur Constant-Force Tourbillon.

Mechanical movement – Power reserve display – High-precision moon phase display – Double moon phases for the northern and southern hemispheres – Countdown display showing phases until next full moon – Tourbillon with integrated constant-force mechanism – Glucydur® beryllium alloy balance with high-precision adjustment cam on balance arms – Screw-in crown – See-through sapphire-glass back – Limited edition of 50 IWC replica watches.

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