Picked up a 50 cents which is actually a much harder denomination to find compared to the other denominations. This would be the third province that I have, Yunnan being the easiest followed by Kwangtung. The rest are hard. Technical weight of this is meant to be 13.5g and 33mm. I believe that coins from this era do have quality control issues so there are small variations in weight. Coin in doubt is in top left. Weight of the 5 are as follow: Hupeh (top left): 12.55g Hupeh (top right): 13.49g Kwangtung: 13.40g Yunnan (left): 13.54g Yunnan (right): 13.27g Edge does seem to be odd. The questionable coin is also 1mm smaller which can be seen when I held the coins on a flat surface. These are arranged by the order mentioned. Thoughts?