How is “that's the ticket” used?

In The Life and Death of Colonel Blimp (1943), one line is: “That's the ticket. Load with No.4.”

Which movie is “that's the ticket” from?

The clip at the top of this page is from The Life and Death of Colonel Blimp (1943).

used to say that sth is just what is needed or that everything is just right

informal · anticuado · Se oye en 4 películas

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used to say that sth is just what is needed or that everything is just right
See? That's the ticket.
Hey, that's the ticket!

Definiciones del Oxford Advanced Learner's Dictionary, 9.ª edición

That's the ticket. Load with No.4.

En 8 películas · n.º 1