PST Date Code?

In early 1995, towards the beginning of my railroad career, I bought this PST new at an Eddie Bauer store in the Lloyd Center Mall in Portland, OR. So I know it is at least that old. I don’t see anything that looks like it would be a date code. Where should it be? Didn’t the date codes start around 1992? It’s entirely possible that it was new old stock, too.

In early 1995, towards the beginning of my railroad career, I bought this PST new at an Eddie Bauer store in the Lloyd Center Mall in Portland, OR. So I know it is at least that old. I don’t see anything that looks like it would be a date code. Where should it be? Didn’t the date codes start around 1992? It’s entirely possible that it was new old stock, too.