The product is a heavily illustrated 18th century book titled DIDEROT/d'Alembert ART of HERALDRY/Coat-of-Arms, featuring many plates. This unique and rare publication by Denis Diderot and d'Alembert is a valuable collectible for those interested in 1700s European culture, specifically in the field of trades and manufacturing. The book is written in French and is a facsimile of the original 1700s work, adding to its historical significance and appeal to collectors of antiquarian literature.