Universal flexible stencil for marking watches made of polyester

A universal stencil for placing numbers and divisions from 20mm to 60mm in size on boards with a diameter of 20cm to 60cm.
Made of flexible 1mm polyester with engraving of the board sizes.
The stencil consists of two parts:
a rectangle with an engraved scale with numbers and a disk with a hole in the center and 12 slots around the circumference. The numbers on the rectangle correspond to the board sizes. The slots on the disk help to clearly maintain the evenness of the lines.
The stencil is convenient and easy to use.
Let's consider in detail how to use it using the example of an art board with a diameter of 40 cm.
Take a round disk. Find a hole in the center of it and compare it with the hole in the center of the art board. On the rectangle, look for the number 40 (the board diameter) and compare this mark with the center of the art board. The line with round holes in the middle of the rectangle should clearly coincide with the slots on the disk.
In the large window on the rectangle, place the numbers.
Sequentially rotate the rectangular stencil relative to the disk until the slots on the disk and the stencil itself are combined to lay out all the divisions and numbers of our clock.