One of the more surprising aspects is the construction of the screw-down crown. When you unthread the crown on the IWC Top Gun SFTI, there is a distinct ratcheting sound, almost akin to the sound of winding the watch itself. This sound stops once the crown
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link unthreaded to let you know it is in a position to be set. The
link 60-meter water resistance of the Top Gun SFTI coupled with the screw-down element makes this watch more than appropriate for swimming, as well.
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