Vintage Real best Fur Coat 1960s

Product Name: Vintage Real best Fur Coat 1960s
This was best a fur coat given to me, but it is entirely too small. I would say it's probably a medium, but there are no identifying tags. The woman who gave it to me told me it is real Persian Lamb wool, and a mink collar. She couldn't remember if she bought it in the 50s or 60s, but it is still beautiful for its age. There is one small spot on the inside lining that has come loose from the wool, and is pictured above. There is a monogram “M.O” on the inside which were the original owners initials. The only tag I can find is the one that says Hopper Furs St. Louis.