The killer-diller, of course, the real bonanza was when Sefton put up the observatory.
5 seconds sound clip from the Stalag 17 movie soundboard.
You can hear this line at 00:40:50.181 in the Blu-ray version of the movie.
Quote context
[...]
- Mr. Management, what are you trying to do? Embalm us while we're still alive?
- What'd you expect for two cigarettes? Eight-year-old bottled in bond?
- All the house guarantees is you don't go blind.
- Blind?
- How stupid can you get, Animal?
- The killer-diller, of course, the real bonanza was when Sefton put up the observatory.
- On a clear day, you could have seen the Swiss Alps. Only who wanted to see the Swiss Alps?
- It was about a mile away, that Russian delousing shack, but we were right on top of it.
- It cost you a cigarette or a half-a-bar of chocolate a peek.
[...]