Well, it has to do with time.
5 seconds sound clip from the The Time Machine (1960) movie soundboard.
You can hear this line at 00:07:14 in the Blu-ray version of the movie.
Quote context
[...]
- There in that box rests the result of two years' labor.
- I wanted to finish the job before the new century began. I barely made it.
- Well, it has to do with time.
- I've always maintained what this nation needs is a reliable timepiece.
- The Army needs one for the artillery, you know.
- You couldn't do better, George.
- So that's why you've been in hiding?
[...]