IWC GST Deep One IW3527

This is a almost immaculate example of a cult dive watch.

Our IWC has hardly been worn – a titanium case (still with IWC sticker) and titanium bracelet, automatic IWC caliber C.8914, and the extraordinary depth gauge that lets water enter the case!
An internal rotating bezel, black dial with luminous hands and indicator, yellow accents throughout the dial, a date window at 3 o clock, sapphire crystal, solid case back – all in amazing condition.

The IWC Deep One, introduced in 1999, was the first wristwatch equipped with a mechanical depth gauge that showed depth up to 45 meters. Depth was calculated via a Bourdon tube acting as a pressure-sensing element. Water entered the coil tube, causing it to rigidify. The pressure was shown by an independent depth gauge hand in white with a yellow hand indicating the greatest depth during a dive. A pump was furnished with the watch to test the pressure gauge (sadly ours has been lost). IWC made the Deep One for a very short period due to high production costs, making beautiful examples like this one very rare. Only a few IWC Deep One were sold and the watch was discontinued.

So, it is a cult timepiece for those that know!