Hi! I recentely acquired this fur bolero and I've never seen a fur that resembles this. It is long, kind of hard, and reflects in a golden color. I think it maybe some kind of monkey or other exotic skin.
It looks more like beaver to me than monkey. Monkey is much more shaggy. Have you looked at the VFG Fur resource? Here is a link https://vintagefashionguild.org/fur-resource