With dark cases and black dials, these stealthy tool watches fly under the radar.

In 1972, Ferdinand Alexander Porsche, the grandson of Ferdinand Porsche and designer of the legendary 911, split from the carmaker to start his own design firm, Porsche Design. Soon after, he launched the Chronograph 1, a chronograph watch with a stainless steel case powder-coated in black. It is generally accepted as the first all-black watch design, with watchmakers like IWC and Heuer following up soon after with their own blacked-out watches.
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