Original Air Force Knuckle Biter Pale Beer Label 8oz. Flask Field Artillery The 21st Signal Brigade is

The 21st Signal Brigade is is a major subordinate command of the 9th Signal Command and is currently at Fort Detrick

The crossed keys represent maintenance and supply while the castle gate symbolizes defense

The bundle of five arrows is adapted from the state flag of New Hampshire and signifies the unity of the five counties that comprise the state

After being reduced in 1870 and disbanded in 1898 following Puerto Rico's cession to the United States

Original Air Force Knuckle Biter Pale Beer Label 8oz. Flask Field Artillery The 21st Signal Brigade is8 oz Stainless Steel Construction Not dishwasher safe Designed & printed by USAMM.