1920 to 1931 China Yunnan 50 Cent (half dollar size) coin with Chinese characters on the obverse and a side view of a Dragon on the reverse, with 4 circles below the pearl. This is from the Republic of China period. It weighs 13.20 grams, is 0.500 fineness, and has 0.2122 oz. ASW.

I acquired this coin many years ago. I would grade it AU with some mint luster still visible. There is a long die crack near the right side rim and some scratches on the reverse surface. I don't think this coin has been cleaned.

I have provided 2 sets of photos using different lighting. Please look at these photos to see for yourself. 

I have listed other China Yunnan 50 cent coins.