Brown Leather Button Up Shirt/Jacket

This is 100% leather with 100% acetate lining. In excellent condition, slight discoloration in the lining. Unfortunately there are no tags so brand and size is unknown. It potentially is a Trachten aus Osterreich von Mackintosh looking at the buttons. I have not been able to find anything similar, it is unique. I wear size M and am petite this fits big across the chest and in arms so I am guessing it would be a large. It would be beautiful as a shirt or jacket.