1940's-50's Western Style Dragon Silk Tour Shirt / Jacket

Occupation Period Through Early 50's Western Style Silk Tour Shirt / Jacket. Black and white silk, pullover shirt. Directly embroidered in the white yoke is a dragon and some sort of mounatin. Has a small / lightweight aluminum zipper marked  with a small "mum". Large pointy, 40's style collars. This one has been worn and some of the seems are a little loose and the white areas have some age spotting. About a size medium. I have always believed that these shirts pre-date the reversible embroidered Japan jackets.