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Well the Germans started hollow grinding earliest, what with them inventing the technology around 1870 if memory serves.

I might be corrected on that but I think the English soon followed, even...

Early 1800s is my guess, circa 1810/1820. The earlier makes were a bit different.
Looks a bit like what you'd find in a napoleonian officer travel kit.

The one you absolutely mustn't touch without a lot of practice is the white one, still from the first picture.
I'd love to have a closeup of this one, because I suspect it's the true treasure of...