The tetras is an etching realized in 1771 by E. Fessard. Signed in flat. The Artwork Belongs to the Suite "Natural, General and Particular History with the of the King's Cabinet". Paris: Royal Imprimerie, 1749-1771. This piece is attributed to the mentioned designer/maker. It has no attribution mark and no official proof of authenticity, however it is well documented in design history. I take full responsibility for any authenticity issues arising from misattribution