Men's Elegant Silk Lined Brocade Smoking Jacket Unbranded sz M

This is a beautiful silk lined brocade jacket.  There are some signs of wear though; as you can see in the last five pictures.  Both cuffs on the sleeves are a little thread bare and the sixth picture shows there's some damage inside on the back and the last two pictures show where the armpits have been repaired.  I'm unsure what the brocade material is made from; it may be polyester, silk or some sort of blend.  Since no tags offering the size are present, here are the measurements: from the armpit to the end of the sleeve is 19.5 in. from the top of where the sleeve attaches across the back to the other seam is 21.5 in. and the robe is 55.5 in. long.