Great finds, John, thank you!
Would you consent to my posting the images?
Most remarkable in my mind is the detail where you see that the internal ball load actually fills the canister - and this does make sense physically, in contradistinction to the one at Hermann that we have been discussing ...
And: you are definitely right about the preservation-friendly Swedish climate. I should add, though, that our Bavarian stored items are generally preserved quite fine as well - of course given the fact that they were not acid-treated by some museum member gone rust hysteric ... and that species is by no means extinct!