Chronograph Arch Replacement
thingiverse
Replacement Arches for Chronographs, might not suit all types, but you can try scale them around to find a fit.
Download Model from thingiverse
With this file you will be able to print Chronograph Arch Replacement with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Chronograph Arch Replacement.