There's tort, and then there's Craigslist oldest tort...

Here's a Gibson (or more accurately "The Gibson") that's over 100 years old. The more things change...
I will say I like the tort guard I recently bought for my white Pbass better than this one.

1918 Gibson mandolin - model A - musical instruments - by owner - sale

And to think, the Fender site shows they've only been using tort on pickguards since 1959...