I recently built a custom bezel insert with a pulsometer and an asthmometer scale which lead to this dial design.
As usual there were a few revisions along the way. The original design was with the 12 hour scale on the outside but I quickly scrapped that as soon as I realised the hour and minute hands would partly cover the pulsometer and asthmometer scales.
The watch took me 2 days to design and build and below are just some of the masking and test dials I made. This is perhaps half of the material that didn’t get binned.
Perhaps the most satisfying part of this build was figuring out the seconds hand. Having the luxury of making the hand allowed me the freedom to be very specific about the scales and how the seconds hand interacted with them. I made 3 of the hands black so as to blend in with dial and left 1 white to be the main timescale seconds indicator. They are all white tipped to be used with either pulsometer or asthmometer scale without delay.
