Etymology: "Drop The Dime" ?

Factual Questions
1

Simply, where does the phrase “to drop the dime on someone” come from?

2

Using a dime in a payphone to call the cops.

Cite.

3

…and it first appears in print in 1966(so far).

4

So, nowdays, you have to drop two quarters on their ass!

5

Gah I feel so freakin’ old.

I also remember when you used to truly “dial” the phone . . .

6

dime and dide wait for no man…
:slight_smile:
or even find a phone that takes money?