1955 Short Boot with Paratrooper ? Zipper endorsed by a Ballplayer. I've seen a few variations of this
style of boot from the mid fifties, often with the strap, in roughout suede or even a diamond quilted leather.
One even had a built in sheath for a knife.
1955 Paratrooper's Jump Boots.
An Ad from a favorite boot maker of the mid Fifties, Chippewa.