1950s black dress mid century store with back metal zipper size Medium

store Vintage 1950s black dress with back metal zipper. Size not labeled estimated medium. Please see measurements. Condition beading looks like it has been repaired in the front - see last photo.

Measurements taken across front laid flat

18" across front armpit to armpit
13.5" across front of waist
18.5" across hip
40" length shoulder down