Wuerth 512, working proof before final edtion of 50. Signed in stone lower left and lower center: "Jo Pennell"; inscribed in pencil in lower margin: "Ready to Start proof - 2 colo square up no border". Watermark is "Ingres M.B.M. France". A fine impression on laid paper, in fine condition, with full margins. A World War I poster was created from this image in reverse with additional work in the sky.