Vintage World Taekwondo Federation Copper Medallion Grand Master Sang Sop Kil

Description

Vintage World Taekwondo Federation Copper Medallion Grand Master Sang Sop Kil.
Found at an estate sale. I believe this is made out of copper. It is surprisingly heavy and weighs weighs 7.2oz.
Markings on the front: Michigan Taekwondo Invitational Championship.
Markings on the back: The World Taekwondo Federation. Tournament Director Grand Master Sang Sop Kil.
Background I found on Grand Master Sang Sop Kil:
Grand Master Sang Sup Kil is one of the highest ranked black belts in the world of Tae Kwon Do. His credentials and reputation are world renowned. He is a 9th degree black belt, certified by the World Tae Kwon Do Federation. Grand Master Kil has more than 39 years of experience in teaching, studying and researching Tae Kwon Do. He is an International Master, Instructor, Coach and Certified Referee. He was the Korean National Champion between the years of 1965 and 1968.
He was also a U.S. Army combative instructor from the years 1962 to 1980. He has promoted more than 2000 black belts in his career, and has taught thousands of U.S. soldiers stationed in South Korea.