I have a strong tendency to ignore pwts.
I do have a small AB mouse, which came in its original box, which is very yellowed with age, although the paper label on it is fine. No AB mark.
I did "discover" AB glass fairly early on in my collecting days (~ 1989 onwards), and had a jack-in-the-pulpit style vase in a green and brown colourway very like Ronnie's current little posy vase,.
This did not have the AB mark, and at the time it was the only kind of AB glass I ever did see, and none had the mark.
That's all I know.