Robert Benard – Technical Study of a Horological Pivot Friction Machine – Engraving (c. 1765)Proverde Auctions4.5(64)$5Aug 8, 2026
Georges-Louis Leclerc de Buffon – Technical Plate of a Dredge – Engraving (18th Century)Proverde Auctions4.5(64)$5Aug 9, 2026