Drums Along the Dusseldorf - S3-E30
Continuity mistake: At the end, when Hogan and Schultz are admiring the Indian headband sent by Carter, Klink comes walking out behind them. As he stands in the door, you see Klink fold his hands in front of his waist as Hogan is talking. After Klink starts to talk, the camera cuts to a close up of him and he suddenly has his riding crop under his arm.
Answer: It's a comedy, not a documentary.
stiiggy
Perhaps it was counterfeit. There are numerous episodes where they deal in counterfeit monies.