This is an original antique full wrap brooch pin, historically used to mount US military medals such as the WWI Victory Medal. It features the classic early 20th-century split-bar design with a curved front facing plate constructed from a durable brass alloy. 

The reverse side preserves its original, functional nickel-silver pin and rotating lock catch configuration mechanism. Measuring approximately 1 1/2 inches in length as displayed alongside the ruler, this authentic piece of military hardware carries a rich, dark age-toned patina. It serves as an excellent replacement part for historical medal restoration or a great additions to a collection of WWI field gear and insignia.