ID needed please

[motto]

I have a couple of the jacks that those handles are made to operate. I'm fairly sure that they came from Keith Adam many years ago. He had a quantity of them.
The only markings on them are the raised, cast letters 'No' and arranged vertically below that the numerals.
2
2
2
They may not even be military or vehicle specific.
I have a vague memory that someone suggested they were part of the equipment for a Bofors Gun. Perhaps that is a clue?

David