Porsche Design Flat Six P'6351 most of the time. Have some vintage and not so vintage Rolex, Tudor, Movado, etc.
The dial looks like a dashboard instrument.
The case is designed like a piston.
The strap has a tire pattern inside and the rotor is shaped like half a wheel.
Oh, and did I mention the Lume?
I love the design of this watch and is a great daily!