They were so iconic in the late 60's early 70's, and cost ( from memory £18 a pair? in 1970) Could have been Army and Navy Stores on Carr Lane where, as lads, we used to go to see them. I say see them because we wouldn't afford to buy them. A mate of mine, now long departed, once tried a pair on them walked out of the shop with them on which took some nerve as you had to go down to the basement to try them on.
I used to borrow a pair on matchdays from a friend and take them back the after the game. Doc Martins were seen as part of the uniform of hooligans and my old fella would never let me have a pair even if I could have afforded to buy them. Talking school age here when owing a pair of 'air wear' Doc Martins was something we all aspired too.