Cryptologic Services Group – Bahrain. National Secuirty Agency / NSA. Condition: Used, but in good shape. This coin is 2 inches in diameter. NSA has offices around the world and four cryptologic centers outside of the headquarters in Maryland within the United States. Personnel are deployed to all major military commands and to locations around the globe where there is a U. Military presence to support our military customers. Many of our deployed personnel serve in Cryptologic Services Groups, providing dedicated support at the combatant command or headquarters level. Never personally given any of the coins. All coins are guaranteed to be in excellent condition unless otherwise specified above. The free listing tool.