Here's a tough pair o' boots the
seller calls "Unknown 40's Engineer Boots." Frankly, they have the characteristics of 1950's Chippewa's - rectangle instep buckle with gradually tapered pointy instep strap and sharp-cornered square upper buckles. The aftermarket sole/heel work are obvious. One thing the seller did get right was the Horsehide leather, as indicated in the second photo.
They were sold for ¥49,350 or $625.00, which is pretty much on par with they'd sell for Stateside.
www.vintageengineerboots.com