Diamond plate, how traditional?

Is this on the Diamond T truck with the early //////// vs the later light weight \\\\\\\ pattern?

 

No second thoughts, just wanted to see if it was available in the mid 1960's.

After all the work measuring and cutting to make sure everything was going to fit perfect it's definitely not being replaced with something else.

Also I'm using it for the floor only, I'm using polished aluminum for the firewall and dash.


Thanks for all the info everyone.

 

Some of the bottom ones here are kinda cool but I cant figure where to use them on something I have right now.(pic from mcmastercarr)