Outer frame: On verso: upper left in black: "D. R."; upper left in red: "9."; upper centre in black: "18". Stretcher: On verso: upper left small red stamp, illegible; upper centre: upper centre in red: "1601; upper right stamp of the frame company; upper right in blue: "frankfurt main"; upper left in red: "8"; left centre in blue: "679/332"; lower right stamp of the frame company; lower left black customs stamp: illegible; lower left in pencil: "1601"; lower centre stamp of the frame company. Canvas: On verso: upper centre white chalk, blurred
