DUBY. Tobiesen. Recueil général des pièces obsidionales et de nécessité. Paris, France. Author's widow, Debure. 1786. 1 small folio volume, glazed fawn calf, covers framed with gilt triple fillet with fleurons at the corners, interior roulette, ornate ribbed spine, brown morocco brown morocco, gilt edges. Posthumous first edition of this treatise on siege and necessity coins, illustrated with 31 plates. plates. A fine copy with full margins. Bookplates on title and 2 white endpapers: Auguste Fière à Tournon and A. Brölemann. An angular halo reinforcing itself at the end of the book.