CoventryUK, You have a treasure there!!! She is a beauty, and I like her name. Wow!! That case is in great shape. I think you are right in the fact that she hadn't been used much. Be sure and oil her if she seems to need it. Once you get that thread nest cleaned out, she should be ready to go. I know you will really enjoy her. Congratulations on your new little machine.
I just noticed that she came with an old oil can. Keep that as an antique, but get new to use on her. I'm so jealous of the great instruction manual you got with her. I got a newer one with my old machine, and would like one from the 1930-40's to go with my machine.