Vintage Women's Navy Beaded & Sequined Short Sleeve Formal Shift Dress.
Back zip closure with top snap plus hook and eye. Keyhole cutout with top snap and double hook and eye closure. All hooks and eyes are there but blend in because everything is dark. I had to use a flashlight to see where they were.
 
Excellent condition overall. There may be a few missing beads/sequins but nothing comes off when I shake it. This is a gorgeous dress and would be perfect for any formal event.
There are NO tags on this but it measures like a medium.

Bust is 38" and stretches to 40".
Hip is 38" and stretches to 42".
Length is 39 1/2".
Back slit is 4 1/2".
Smoke free, pet free home.