- But what use could he make of that paper?
- To make money, his kind of money, counterfeit money.

7 seconds sound clip from Batman (1966) - True or False Face (S1E17) TV Series.

You can hear this line at 00:15:51 in the Blu-ray version of the movie.

Quote context

[...]

- I can't figure it out, Batman.

- I think a little session with a Bat-analyst might clarify things, Robin.

- Uh, I-I seem to be short of cash. Alfred, have you a dollar bill?

- Certainly, sir. There.

- Thank you.

- By focusing ultraviolet light and applying the principles of controlled fluorescent diffraction, we can readily discern...

- Why False Face printed his message on the same kind of paper they used to make money.

- But what use could he make of that paper?

- To make money, his kind of money, counterfeit money.

- Will the man stop at nothing?

- This paper is made by a top secret government process indeed... only a few people outside the official bank note printing company are aware that it's the only paper that cannot be counterfeited.

- Uh-huh!

- You found something?

- The solution, sir?

- The size... the material it all fits. This is official bank note paper.

[...]