Vintage Black Corcoran Work Boots - Size 10

Excellent vintage field boots for work or combat. Hardy leather, cap toes, vibram soles. Not sure how to date them but guessing 1960s based on other items in the estate they were sold with. The only real sign of wear is on the back outside edge of vibram sole, which has worn down unevenly from the rest - see final 2 photos. Also, the adhesive on the top thin layer of the insoles no longer holds them in place, but this is quite minor. Boots sold as is. Mens Size 10