- Six hundred years?
- Yes, sir. Six hundred years. That would be quite something.

9 seconds sound clip from the The Bridge on the River Kwai movie soundboard.

You can hear this line at 01:14:19.005 in the Blu-ray version of the movie.

Quote context

[...]

- After all, we mustn't forget that we've wasted over a month through an unfortunate disagreement for which I was not to blame.

- Is there anything else?

- No. Thank you. The meeting is closed. Good night.

- I hope these Japanese appreciate what we're doing for them.

- For the moment, I'm not concerned with their appreciation.

- Good night, Clipton.

- Good night, sir.

- By the way, sir, I meant to tell you there are trees in this forest very similar to elm. And the elm piles of London Bridge lasted 600 years.

- Six hundred years?

- Yes, sir. Six hundred years. That would be quite something.

- Good morning. I'm looking for an American named Commander Shears.

- Oh, yes. Down on the beach.

- Oh, thank you very much.

- Kiss!

- Too many eyes.

- You give me powders, pills, baths, injections, enemas... when all I need is love.

- It's true. All you really need is love.

[...]