Vintage acoustic guitar case, likely for Harmony or similar brand guitar from the 1950s-1960s

This appears to be a vintage hardshell guitar case from the mid-20th century, commonly used to protect acoustic guitars manufactured by American companies like Harmony, Stella, or similar budget-friendly brands popular during the 1950s and 1960s. These chipboard cases were standard issue with many guitars of that era, featuring a distinctive mottled green or brown fabric covering over pressed wood construction. Such cases are sought after by vintage guitar collectors, folk music enthusiasts, and players who appreciate authentic period accessories for their instruments. They represent an important piece of American musical history from the golden age of acoustic guitar manufacturing, and are valued both for their nostalgic appeal and their ability to complete a vintage guitar setup authentically.