Unter (playing card)
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The Unter, formerly Untermann, nicknamed the Wenzel, Wenz or Bauer, and also called the Under, is the court card in German and Swiss-suited playing cards that corresponds to the Jack in French packs.
The four Unters in a German pack of cards (Bavarian pattern, Stralsund type)
An Under of Acorns in a Swiss German pack, c. 1850, with the acorn near the bottom
Doppelkopf
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Doppelkopf, sometimes abbreviated to Doko, is a trick-taking card game for four players.
A 40-card Doppelkopf pack (i.e., without nines).
German-suited (Altenburg) Doppelkopf pack (without blanks)
A "Doppelkopf" trick, two tens and two aces
Doppelkopf tournament under way