The Keyhole Neckline

The keyhole neckline has been around for some time but was most popular in the 1940s. The keyhole may be a simple slit in the neck of the blouse or dress.
The split is usually but not always secured at its top with a hook and eye or loop and button.

The second type of keyhole is more of a circle or oval shape cut out of the neckline.
The neckline has been used for swimwear, eveningwear and a host of other garments. The keyhole must be well placed in the garment so it will be attractive, however during the 1970s; a large, low cut keyhole was popular in the disco era in order to reveal a lot of cleavage.

Who wears the keyhole neckline?