2.75" Silver-tone vintage stylized "M" monogram stick pin (or lapel pin)

This item is a vintage stylized "M" monogram stick pin (or lapel pin). The engraved lines on the front face form a modern, abstract letter "M" inside a rectangular plaque. 

The back view shows a basic screw mount assembly holding the main straight pin shaft to the decorative head, a common design for custom or mass-produced promotional corporate and fashion jewelry from the late 20th century.

The estimated value for this vintage monogram "M" costume stick pin is between $10 and $25.

Because it features a standard base-metal composition and a basic screw-mount hardware construction, its value relies entirely on its appeal as a vintage fashion accessory rather than precious material weight.