Vintage Gold-Tone and Green Enamel Rectangular Brooch/Pin

This is a small, rectangular decorative jewelry piece, likely a brooch or lapel pin, displayed on a wooden surface. The item features a slightly curved or domed rectangular face with rounded corners. The base metal appears to be a gold-tone alloy, exhibiting a warm yellow metallic luster. The face of the pin is decorated with a botanical motif consisting of stylized green leaves and stems. These green elements are executed in a champlevé or cold enamel style, where the green pigment fills recessed areas of the metal. The green color is a medium sage or olive tone with some visible textured mottling within the pigment. Physically, the piece appears to be approximately 1 inch to 1.5 inches in length. In terms of condition, there is minor surface wear and light scratching consistent with age and previous use. The gold-tone finish shows some darkening or light patina, particularly around the edges of the enamel inlay. No obvious maker's marks are visible from this top-down view, but the design style is reminiscent of mid-20th-century costume jewelry, potentially 1960s or 1970s. The craftsmanship is of standard costume jewelry quality, with clean lines between the metal and the enamel fill. The overall aesthetic is organic and botanical, typical of nature-inspired accessories from that era.