This is a Pendleton wool shirt. I purchased it at a private sale at Mr. Yukio Akamine's home atelier. The year was unclear, but thanks to a comment, it was confirmed to be from the 70s! There's a large hole in the left elbow and a small hole on the back. The elbow hole is quite big, so I thought it might look cool with elbow patches, but I haven't had time to do it, so I'm putting it up for sale. It has a lot of character!! Feel free to contact me! The size is listed as L, but it probably fits like a M. Thank you for looking.