My first thought was labourer, but not a term usually used for women.
I am not convinced about Contractor's either.
I came up with Food Container Tin's Labeler
Thank you MollyMay. Now I can see too. Not that it helps with an answer though.
If it wasn't for those strokes above I would say 'condiments' but they are very clear pen strokes.
Well thank you all for trying. I think we can safely say she was labelling some sort of food, but what it was might remain a mystery. I'm sure she was jolly good at it anyway!
Trying to get away from 'Custard Jars Labeller'. Once in the head, it's very difficult to think otherwise.
Any long-established companies in that area, I wonder, that could give us a further clue? I've tried a couple of links but they can't be found, which is always the way.