Vintage 1930s / 1940s German Klammern apron. Klammern means clothing pins and this apron would have be worn while hanging laundry up to dry. It has a very large pocket to hold many clothing pins. The back has a button closure and the waist currently measures 32" (the button could obviously be moved, or another added, if it needed to be made smaller). The apron measures 18 3/4" long and the width at the waist is 12 1/2" and the width at the bottom is 16 3/4".
The apron is in good condition with light wear.