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Looks Swedish from the 3 Crown/ S stamps and in any case I believe it was purchased in Sweden as a gift for EH. The O8 would therefore make it 1940, which again fits in with what I expect of the item's history
However, I have had a look at the town marks at
(admin edit - see Posting Requirements )
and while it looks a bit like the B for Bollnäs and perhaps a bit like the U in Uppsala they are not convincing.
I thought as it was from 1940 that it would have appeared in the registry at http://search.swedac.se/sv/namnstamplar but no luck with typing W&TB though perhaps that's not a B either......
Are there other better online resources than the ones I have listed above? I do read Swedish.