This is an impressively large and heavy coin. Looking at Chinese coins of similar size and weight in Zeno, there are some similarities, but I'm not seeing a match. The most similar coins listed there are 100 wen, Xian Feng yuan bao from Henan, 1851-1861, so if I had to guess I might speculate that your coin is some variation on this. The second photo should be rotated 180 degrees.