Insignia Description
A Silver color metal and enamel device 1 1/8 inches (2.86 cm) in height overall consisting of a shield blazoned: Per bend Argent and Tenné. Attached below the shield a Silver scroll inscribed "IN MEDIAS RES" in Black letters.

Symbolism
The shield is in the colors of the Signal Corps.

History
The distinctive unit insignia was originally approved for the 59th Signal Battalion on 9 April 1932. It was redesignated for the 1st Armored Signal Battalion on 7 May 1942. The insignia was redesignated for the 1st Signal Battalion on 5 February 1962.

Source: The US Army Institute of Heraldry