It isn't actually a "coin". It's a souvenir medal, sold at (and depicting on the reverse) the Sun Yat-sen Memorial Hall in Mainland China.
Wikipedia.
It's the sort of thing you'd find for sale for a few dollars in a delaer's "mystery items" scratchtray.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis