Age of boots

Hi these are US-jump boots I assume. I've been told they are used in WW2 but I doubt that. I think they are 1950's or later. Can anyone indicate their age/period of production?

 

http://olive-drab.com/od_soldiers_clothing_m1948_russet_boots.php

With this picture they could be WWII jump boots or Korean War Russet regular issue. The article explains rhe difference, but basically, the Russet had a one piece rubber sole where the jump boot had leather between the sole and heel.