My uncle gave me two of these little bottles that he received as a wedding favor a few weeks ago. My German isn't great, but I think I've translated everything on the bottle:
"Original Westerwälder Kümmel
Nach Alten Westerwalder Rezepten (From an old Westerwald recipe)
Birkenhof-Brennerei Klöckner GmbH (Birkenhof-Brennerei GmbH is a distillery I think, I don't know what Klöckner means)
Deutsches Ereugnis (Made in Germany)"
So I gather that it is a 64 proof liqueur called Kümmel made in the Westerwald area of Germany from an old regional recipe. Google tells me that Kümmel is a clear liqueur flavored with caraway, cumin, and fennel mostly made and consumed in Russia. But this is a fairly dark brown color so I'm not sure it's the same thing.
Can you tell me anything else? And can you recommend how to drink it? Given that I'm not a particular fan of liqueurs or fennel I doubt drinking it straight would be good. Perhaps a mixed drink of some kind?