BEING RESEARCHED - "SM 80" Wing Lapel Pin with Black Details - NOT FOR SALE UNTIL IDed

This is an unidentified lapel wing. It bears the letters SM and has a small square reading 80 in black paint at its center.

Circa unknown.

Approximately 1/4" in height and 1" in width.

Gold-plated brass with painted details.

Horizontal pin with drop-in locking swivel catch.

None.

This is from an unidentified collection which we will be listing more of over the next few months. Item will not be sold until it is identified. LX1/12

7+ (Very Fine+): The wing shows light wear only.

As with all my artifacts, this piece is guaranteed to be original, as described.