Shield
Tenn, on a bend double cottised potente counter-potente Argent, a key Sable.
Crest
On a wreath of the colors Argent and Tenn a broad arrow with point up divided fesswise Gules and Azure and charged in base with a fleur-de-lis Or interlaced saltirewise by a machete and a bolo knife blades up of the first grips and pommels Sable.
Motto
KEY TO COMMAND
Shield
Orange and white are the co colors traditionally associated with the Signal Corps. The white design is taken from the arms of Champagne where during World War I the Battalion saw action and was awarded battle honors. The key from the coat of arms of the city of Lisieux is symbolic of Normandy, the key to the fortress of Europe, and represents battle honors earned during World War II.
Crest
The color blue and the gold fleur-de-lis refer to France, where the unit served during World War I and II. The arrow represents the assault landing in the Normandy Campaign, World War II, and scarlet, the color of the Meritorious Unit Commendation awarded the organization for that action. The machete was suggested by the sugar cane crop of the Dominican Republic, and the scarlet, refers to the award of the Meritorious Unit Commendation Streamer inscribed "Dominican Republic." The bolo knife, long associated with the Philippines, denotes service during the Philippine Insurrection.
The coat of arms was originally approved for the 50th Signal Battalion, Corps on 4 May 1954. It was redesignated for the 50th Signal Battalion on 26 Feb 1959. On 25 Apr 1989 the coat of arms was amended to add a crest and revise the symbolism.