Ferdinand and Edouard Gyselynck – Patent Diagram: Van den Heuvel’s Industrial Steam ApparatusProverde Auctions4.4(56)$55 hrs Left
Robert Benard (1734-1777) – View of Bell Founding and Mold Fabrication – Engraving (1763)Dahlstroms Auctioneer4.2(16)€205 days Left
Robert Bénard (1734 – 1777) – Technical Study of Tallow Rendering and Butcher’s EquipmentProverde Auctions4.4(56)$55 hrs Left
