Dating a Football Facemask

[volunteer]

Here's picture of two different style facemask clips. What years do each of these clips date to?


http://oi61.tinypic.com/oidsib.jpg

http://oi60.tinypic.com/2m6mpnl.jpg

[yosef777]

Roughly speaking the top photo is from the early 80's and the bottom photo is basically the entire 70's.