Here is a manual for a DIY USB-C Charging adapter for all fossil watches with the magnetic charging ring type.
USB C Jack
2 Pogo pins
7mm Pogo: http://s.click.aliexpress.com/e/M9GjfKC0
4x2mm Magnets: http://s.click.aliexpress.com/e/m77MfMSM
you can stop the print to insert the magnets or print the upper part seperated and glue it together afterwards.
the holes for the pogo pins have to be drilled to 1.5mm for a nice fit.
the pins are straight 5 Volts without any logic besides the 5.1k resistor which is required for some chargers...