Vintage 50s 60s horsehide leather ENGINEER BOOTS motorcycle mens 6D ladies 8

1950s-1960s thick horsehide leather engineer boots in a dark chocolate colour brown with brass buckles. Cat’s Paws neoprene oil proof soles. Marked a 6 D in men’s or a ladies’ 8. I am a true ladies’ 7.5 & wore these with thick socks. The height is about 11”. Outer sole length is 10.5”. Heel is 1.5”. There was a stamp inside with a crown & the letter “K” but it rubbed off. I have no idea what company that represents. The condition is pre-worn, showing natural signs of wear. I tried my best to showcase the scuffs & any flaws. Using high quality polish is recommended. I bought these from a reputable vintage dealer in Toronto many years ago. I wore them a handful of times. These are hard to come by in a smaller size!