Step 2: The cheap quartz wall clock
Now get your cheap unbranded quartz wall clock, just like in the picture here. It helps that when you are choosing the clock, the length of the minute hand of the clock is a little less than the radius of the brake disc. I went for a clock with metal gold coloured hands, but the black or the silver ones would look as nice i think.
Take out all the screws on the back of the clock that hold the front and back together, normally 3 or 4, so that the front of the clock comes off. Sometimes, the front transparent screen of the clock is held in place by a few little plastic clips, so use a thin flathead screwdriver to get it out.
Now gently remove the clock hands, first the second hand, then the minute one, then the hour hand.
The working body of the clock (the black box that has all the insides in it) is normally held by glue. I ripped it off using a flathead here as well. Go gently on it so you dont crack the body.