I love my Ball Trainmaster Pulsemeter COSC so there are times when I don't want to wear it as it might get damaged. I have bought a cheaper second hand watch with a similar movement and made my own bezel insert.
I have been looking for sources of custom made inserts but found a youtube video describing how to print water resistant vinyl stickers for cars on a normal printer. I bought some printable adhesive vinyl sheets and worked out the placement of each marker using the formula Angle=15x360/BPM for timing over 15 mins.
I designed the insert on publisher and cut the insert out with a cutting compass from a craft store.
The result is not perfect but the insert can be replaced easily when it wears out.
I was wondering whether I would be able to obtain a proper custom made bezel insert at a reasonable price?