They're German, and from the tax stamp on the Ace of Hearts I know they're from the period 1923-1929 (when hyper-inflation meant they stopped putting the amount of tax paid on them). The joker is that of ASS (Altenburger Spielkartenfabrik Schneider & Co.), and a little rootling around tells me that this is a standard pattern patience deck no. 212.
It's actually two patience decks, held together in a neat little booklet with HAPAG on it. HAPAG was the Hamburg-Amerikanische Paketfahrt-Aktien-Gesellschaft; it lost almost all its ships in World War I, then rebuilt them and lost the replacements in World War II. Today, it's part of Hapag-Lloyd, which is part of a larger German shipping consortium.
I guess my cards were given away to passengers on the cruise liners. They're quite pretty, but not as good as Dondorf in their prime. Still, not a bad catch in my view, they'll look nice hidden away in the card drawer where my wife can't see them.