Although it is suggested that Heinrich is a Gestapo captain, he wears a Wehrmacht uniform throughout the episode.
The General goes to Klink's quarter's through a door in Klink's office - never used again and later, the door is removed entirely.
The truck that brings the gold to Stalag 13 is not a German vehicle. It is an American Ford F-Series, the first of which was built for the 1948 model year.
Look closely at the front and it can be seen that the raised block letters that spell F O R D have been painted over.
Even though the prisoners build the steps to Klink's office using the stolen gold disguised as bricks, these steps are again wooden in the next episode, and for the rest of the series.
In the Happy Birthday banner Adolf Hitler's name is spelled Adolph Hitler.
This is the first episode where the extendable radio antenna atop Klink's flagpole is used. It will become a staple of the first few seasons.
In Klink's office during the birthday toast, Schultz nearly drains his wine glass but, in his next shot, more wine has appeared.
Hogan and LeBeau impersonate Luftwaffe Captain Hoganburg and Corporal Hoopelman respectively.
Firewood is uncharacteristically stacked outside the barracks.
During one scene when the camera moves in to Klink in his office, you can clearly see the cameraman's shadow on Klink.
When the POWs are rolling in the "snow," it seems to cover their uniforms more like flour than snow might -- it probably looked more realistic when seen on a low-resolution 17" screen back in 1965.
Klink, Kinchloe & Newkirk are all seen smoking cigarettes.
Hogan (and the main co-stars) live in Barracks 2. For some odd reason, the sign reads Barracks 3. To compound it, in one scene, when the door is open, you can clearly see the barracks in the background says Barracks 2 - only problem is that there is no barracks between Hogan's barracks and Klink's office.
Hogan appears in a Luftwaffe uniform and impersonates Major Hoople.
Early in this episode, Hogan reveals that Kinchloe's rank is Staff Sergeant.
Hogan impersonates General von Himmelberger of the German General's Staff.
Throughout the episode, the DuBois character is called Henry, but in the closing credits his first name is Emil.
Carter is asked to tutor LeBeau in rudimentary chemistry, yet allows that, while running a pre-war pharmacy in Muncie, Indiana, he knows very little about chemistry.
The prisoners have a bright red coffee pot and colored mugs in this episode. Later, these were removed in favor of more bland tin items.
Jon Cedar, who usually played Corporal Langenscheidt, is listed as 'Guard' in the closing credits. He is the guard who opened the gate for Schultz and Newkirk.