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(en)
7.0
1939
11m
Documentary
Drama
Overview: The "unseen guardians" of the title are the Postal Inspection Service, which investigates mail order racketeering; the Underwriters' Laboratories, which are shown testing electrical equipment, fire extinguishers, and large floor safes; and those who run orphanages, who assure that the children in their care are placed in proper adoptive homes.
Status: Released
Release date: August 26, 1939
Countries of origin: United States of America,