Nope. That was a much later addition. We had to get through cheddar cheese, chili cheese, nacho cheese (which all tasted the same), and ranch (and all its sub-varieties…which all tasted like sour cream & green onion).
I remember salt & vinegar showing up here sometime in the 1990’s, I think, arguably on the same day as dill pickle-flavored ones.
Fun fact - I just learned that li’l ol’ Tayto was the first maker to offer flavored crisps (unless you count salt as a flavor).
Another fun fact - I used to work with a woman in Oxfordshire who referred to salt & vinegar crisps as “Sal & Vinnie.”