The item is an official commemorative Secretaria-Geral da Marinha (General Secretariat of the Brazilian Navy) wall plaque presented in its original blue velvet-lined display case. The plaque is 3.75 inches wide by 6 inches long.
The engraved brass dedication plate reads (translated from Portuguese): To CMG/USN CHARLES E. RYAN - As a token of our esteem - ARTHUR RICART DA COSTA, Admiral of the Fleet
Arthur Ricart da Costa was a prominent Admiral of the Fleet in the Brazilian Navy. He served as the Secretary-Geral da Marinha in 1983. This plaque was likely issued during his tenure in this position.
