Help with dating/identifying “INDEX” brand men’s shoes

Hi!
I found these shoes in great shape and couldn’t walk away from them for $6….I hope to give them to a friend, but would love to find out any info for my own knowledge. I’m guessing 80s?

Thanks in advance!

 

Don't know the brand. The jazz oxford style is very typical of early-mid 80s but the zig-zag pattern, and the label font look very late 80s or early 90s to me.