Talon Zipper Dating….rabbit hole.

I like old zippers. I think they are way cool and so I wanted to find out if there was an even more comprehensive and exact way to date talon zippers than the photo comparison I’ve seen posted

Europe Vintage】70s talon Check set up

Trying to date this an see if it's probably Horsehide

Talon, M42, #5, Separating Zipper, Khaki Tape, 50cm, NOS

Dating Outerwear by zipper design

Talon Zipper Dating….rabbit hole., Page 2

Europe Vintage】70s talon Check set up

Can yall date this talon zipper? Please : r/VintageClothing

Dating Outerwear by zipper design, Page 3

Swivel Talon Zippers

Dating Outerwear by zipper design, Page 8

Period zipper finds, Page 2