Vintage Purple Blue Black Cardigan

I actually bought this on Mercari not too long ago because I love the colors and the vintage look to it. Looks like on the cusp of 80's/90's. However, it was marked as large because they were taking a decent guess, but this is definitely a medium as it's just slightly too small for me.

As you can see from the pictures, no size or materials are located on tags. The outer material feels like wool and has rainbow fibers through the black and the lining feels like some type of nylon blend.

Hope somebody can give this one a proper home! It really is one of a kind

First four pictures are from previous seller.

"Knit cardigan coat in black with rainbow metallic flecks and the brightest violet and cobalt geometric pattern. Partially lined and has pockets! Excellent preloved condition. No fiber or size tag, approximate best fit for a modern L/XL, see measurements. Shown on a 32” bust, 25” waist model.

Pit to pit flat: 24” (open, flexible fit)
Length: 28”
Shoulder: 18”
Sleeve: 22” "