Going and strike train wheels

Diagram of basic wheel dimensions
When ordering a replacement wheel the simplest solution is to send the original for us to copy.
If you prefer to send a sketch examine the drawing above to make sure that you have conveyed enough detail to enable us to manufacture the wheel.
The most important details are: (1) the thickness of the wheel, (2) the outside diameter across the teeth, (3) the number of teeth, (4) the diameter of the centre hole, (5) the style and number of crossings.