Cyanotype engraving portrait - original print

I am selling an original cyanotype print made from a silver negative made by me in my studio in Auvers sur Oise near Paris (France), based on an old engraving by Lefebvre 1872.

This print is an original chemical transfer, not a print from a printer. This is a unique copy of which each reproduction is different, each original is printed on thick watercolor paper 250 to 300gr.

The original print is signed and dated on the back.

Info: Cyanotype is an old monochrome negative photographic process, through which a Prussian blue, cyan blue photographic print is obtained. This technique was developed in 1842 by the English scientist and astronomer John Frederick William Herschel.