Vintage black fur coat size s/m

This coat was purchased at an estate sale and custom made. It has no tags, therefore I am not sure of the type of fur. The coat is very heavy and the fur is thick , perhaps beaver. Also, it does not have a size inside. I wear an 8 or Medium and it fits well. The coat is flared and longer in the back. The color can lay flat or be flexed up to fit around the neck. It has a two button loop closure.