Red chalk, sample lines with black pen (chalk?) on bottom edge as well as traces of coal (?), framing line with black chalk on all sides, on ribbed laid paper, distance of chain lines (horizontal) |39|39|30|30|39|
Red chalk, sample lines with black pen (chalk?) on bottom edge as well as traces of coal (?), framing line with black chalk on all sides, on ribbed laid paper, distance of chain lines (horizontal) |39|39|30|30|39|