China coin - Real or Fake?

I have a severely tarnish or dirty China coin. The coin measures 43mm and weighs 30 grams. It is non-magnetic. The photos are the best I can get without having to clean the coin. I would like to know if the coin is real or a fake.

not sure, but you shouldn't clean coins and that can often ruin coins for collectors.

Pictures changed a little if it helps ...

Lettering: TAI - CHING - TI - KUO SILVER COIN