Peter Krause wears a Luminox 3051 Black Out EVO Navy SEAL watch in the series 911.

This Luminox watch has an all-black case and dial with black numerals and logo, and can be seen in the last few seasons of 911.

The exact same watch is not available anymore at Luminox but you can find other, very similar Black Out watches at Luminox or on Amazon:

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The same model is also available with white numbers on the dial and bezel, get it on Amazon for $245.

In earlier seasons, Peter Krause wears another model Luminox watch.

9-1-1 is an American procedural drama television series, starring Angela Bassett as Athena Grant-Nash, LAPD patrol sergeant and Peter Krause as Robert "Bobby" Nash, LAFD Station 118 captain, Athena's second husband (seasons 1–8).