Gorgeous Jean Harlow-esque full length black vintage negligee.  This is a Charmode
which was the vintage Sears lingerie line, no longer in production.  I would date this item likely circa 1940s or 50s.  Deep V accent in front and back.  Lace ruffle below the bodice and another strip of lace toward the bottom and the remainder of the skirt flares out a bit from there.  It's in beautiful condition.  No fabric tags, possibly a nylon blend.  Measures small.