This is the original metal plate on which Gorsline executed the design for a print etching to be reproduced on paper. Metal plates are the original medium on which a steel point instrument is used to 'cut' the image into the metal. This would have then been 'inked' and pressed into paper to transfer the print image. Statistically, print collectors do not really clamor for original plates. The estimate is based on actual recent past recorded auction sales of comparables. Retail 'asking prices' can be higher and vary.