That is a 1 tael coin from French IndoChina, made from 1943 to 1944. There were two types made: one that is 34.0 grams, and one that is 38.2 grams. With your coin being in the middle of both, I am not sure which it would be, but it is not a cheap coin (see
here and
here).
Edited by Joseph7420
02/19/2017 8:19 pm