Mysterious Cities of Gold.
French-Japanese animated series from the early 1980's. Followed the journeys of 3 children, Esteban, Zia and Tao and their "guardians" as they search for El Dorado, the mythical Cities of Gold.
I grew up watching this show and absolutely loved it. Its particularly iconic and catchey theme song brings back memories of my childhood.
I printed this on my printer at work, which is a Flashforge Dreamer, at Hyper quality, with extra infill than was probably needed. The 2 parts fit together well.
I did print the photographed one as a prototype (to be uploaded soon) and is only once sided but have since changed the file to be double sided, so it doesn't matter which way you wear the medallion.
It took about 1 hour, 15 minutes to print, but the double sided one I am in the process of printing. The printer says 49 minutes to print at high quality, so it should be a nice quick print.