What 4x5 slide film stock was this? Was "Safety Film" a distinct brand?

[Alan Klein]

Thanks! It looks like you could have taken that shot yesterday. I often think about how easy it will be to scan film 100 years from now compared to massaging a hard drive...

Here's a YouTube clip I came across recently that drives (no pun intended) that point home:

Thanks.

Note that slides do eventually fade. It's a good idea to scan them sooner than later.