Don't Forget to Write - S2-E13
Other mistake: When the recruiting officer is talking to Klink, Hogan and company listen in, as usual. The problem is the coffee pot. Any other time, they take off the top, take out the basket (which is the speaker) and plug in the power: this time, they forgot to remove the top to hear it, which would have muffled the sound. But the conversation was heard just the same.
Other mistake: When the boys are listening to Klink's office, the lid is on the speaker instead of being off.
Hogan and the Lady Doctor - S2-E20
Other mistake: As Hogan and company listen to Klink's office, the lid is on the speaker, so they shouldn't have been heard or at all.
Heil Klink - S2-E22
Other mistake: When the camera pans left following Brauner's car, you can see palm trees in the background. The area the Stalag is supposed to be in wouldn't have palm trees.
Everyone Has a Brother-in-Law - S2-E23
Other mistake: When the boys are listening on the coffee pot, the red light to indicate power is not lit.
Some of Their Planes Are Missing - S3-E2
Other mistake: While Carter starts shining boots, the disturbed stage flooring can be seen in front of the opposite building; the joint between the panels is markedly raised.
Sergeant Schultz Meets Mata Hari - S3-E4
Other mistake: As the lady Gestapo spy comes into the beer hall, Schultz not only has a matchbook in hand, but keeps looking at the action between the bartender and the lady, waiting for his entrance cue.
Funny Thing Happened on the Way to London - S3-E5
Other mistake: When Lieutenant Bauman starts speaking German, his last two words "especial mission" is said in a decidedly French accent. The correct German phrase would be "Sonderauftrag." Non-German terms like "Mission" were generally avoided in the Wehrmacht for ideological reasons.
Nights in Shining Armor - S3-E8
Other mistake: When Hogan shoots the vest, it stays still for a couple of seconds then swings in a way that is not normal.
Nights in Shining Armor - S3-E8
Other mistake: In Hogan's quarters, after Hogan reveals the two Aces up Newkirk's sleeve, Newkirk goes to brush his hair. As his hand goes up, you can see the cards in his hand.
Nights in Shining Armor - S3-E8
Other mistake: In the end, Schultz tests the faucets, and they work correctly. When Klink goes to touch the faucets, watch the drain. The high pressure jet of water comes from it just when Klink is over it.
Other mistake: When the head counterfeiter comes in, there is a sign on the barracks behind him that says "BARRACK 3." Two problems with this. First, Hogan and company are housed in Barrack 3. Second, there is not a Barrack building between Hogan's building and Klink's office building.
Other mistake: The scene in Klink's quarters is one of a few where you can see Larry Hovis' (Carter) wedding ring.
Is There a Doctor in the House? - S3-E18
Other mistake: As Carter gets ready to clean out the stove, Newkirk closes his eyes and winces just before the bellows Carter has blows.
Other mistake: Towards the end, the shot of the plane landing is a recycled shot. Even though Klink waved the flashlight, an unidentified person can be seen in the shot waving a signal light in the midst of the field. Klink was by his car.
Drums Along the Dusseldorf - S3-E30
Other mistake: The fire spread from the back of the canopy to the front too quickly to be real. Therefore, it had to be soaked with an accelerator.
Man's Best Friend Is Not His Dog - S4-E6
Other mistake: When seeing the tanks through the viewfinder, Carter's hands and the background are frozen, and the tanks are actually a clip of a wartime newsreel.
Man's Best Friend Is Not His Dog - S4-E6
Other mistake: When referring to the barracks, usually Klink will refer to the buildings by their numbers (Barracks 2, barracks 3, etc.). In this episode, he calls the building "Building G".
Never Play Cards with Strangers - S4-E7
Other mistake: As Carter brings the German truck to a rough stop, in the closeup, you can see that although Carter and Newkirk lurch in the seats, the truck was already motionless.
Answer: It's a comedy, not a documentary.
stiiggy
Perhaps it was counterfeit. There are numerous episodes where they deal in counterfeit monies.