Clue | Source | Date |
---|---|---|
Devices for "over"-hearing? | Universal | 05 Feb 2023 |
'Copy' machines? | New York Times | 14 Jan 2023 |
They copy everything useful for speaking on the wireless? | Irish Times Crosaire | 28 Jul 2018 |
Staples of old police work | ||
G. I. communication sets. |