I'm not sure what's ambiguous. Certainly I'm generalizing ("anyone") from an anecdote; I'm not trying to make a rock-solid historical claim.

I think most of her factory work was making shells. She was born in 1921; this would presumably been in 1943-45 or so.

What I meant say was it isn't clear to me if she was a worker or ran the factory.

Oh! Just a worker.