Navy Reserve Merchant Marine Insignia

Naval Reserve Merchant Marine Insignia was a breast insignia of officers in the United States Merchant Marine who also served in the United States Navy or United States Navy Reserve. The insignia was replaced by the Strategic Sealift Officer Warfare Insignia (SSOWI) in June 2011, per OPNAVINST 1534.1D. The Merchant Marine Reserve had its beginnings in 1913 when it was called the Naval Auxiliary Reserve.

Source: Wikipedia — Navy Reserve Merchant Marine Insignia (CC BY-SA 4.0)