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'Be careful what you say over the 'phone - you may give away...WWII poster, between 1939 and 1946. Creator: Central Office of Information.
HRM25A46_087

'Be careful what you say over the 'phone - you may...

'You never know who's on the wires! Be careful what you say', WWII poster, between 1939 and 1946. Creator: Central Office of Information.
HRM25A46_343

'You never know who's on the wires! Be careful wha...

'You never know who's on the wires! Be careful what you say', WWII poster, between 1939 and 1946. Creator: Central Office of Information.
HRM25A46_342

'You never know who's on the wires! Be careful wha...