- What did the Krauts trade him for the radio?
- I don't know.

3 seconds sound clip from the Stalag 17 movie soundboard.

You can hear this line at 01:00:34.114 in the Blu-ray version of the movie.

Quote context

[...]

- Cookie, you haven't seen Sefton, have you?

- No, I haven't.

- Hoffy, I'm very sorry about the mousetrap, but the war news are very depressing anyway, huh?

- I might as well also confiscate the antenna.

- American know-how.

- All right, Cookie, let's hear it. Where's Sefton?

- I don't know.

- He wouldn't be at the kommandant's?

- I don't know, I told you.

- What did the Krauts trade him for the radio?

- I don't know.

- Why don't we look in these footlockers?

- No.

- Come on, you little stooge. Hand over them keys.

- I haven't got any keys.

- Okay, then I'll get me a key.

- Okay, Hoffy?- Okay.

- Hey, wait a minute. Hey, don't. Sefton will get mad.

[...]