Not very old and very much not over 10 years. In the internet there you can find the years 1995 and 2000. It's a mixture of very small amount of Haidong Gumdo Techniques and some Iaido-Forms. Later you find other "newly" created forms if you watch them on YouTube. Also the World Koryo Gumdo Federation Logo has very much similarities with the World Haidong Gumdo Federation Logo.
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