A Clockwork Car

While driving home last night, I approached a car with an odd vanity plate. At first, I wondered why someone would spell "Clark" with a 'W'. When I got a bit closer, I saw that plate was "CLKWRK", or "clockwork". I was puzzled why they had that for a plate. Possibly I could see it being on something like a VW Beatle, but it was an Audi. So I had no understanding for why the owner wanted "clockwork" for a vanity plate. Then as I passed the car, the color of the car finally registered and I realized that the plate was just half of the reference.