Have not found an exact match for your Sinkiang (Xinjiang) 1/2 miscal but this link has some interesting information and examples of both counterfeit and genuine coins of that period. Thought it might be helpful.
http://www.xinjiangcoins.com/appendix.html
Scroll down to A8 and you will be able to view both the counterfeits and genuine coins.
http://www.xinjiangcoins.com/appendix.html
Scroll down to A8 and you will be able to view both the counterfeits and genuine coins.




















