![medal, Jean Pierre Droz, 1807, minted, General: 4.7 x 0.3cm (47 x 3mm), Weight: 50g, personification, weapon (sign), allegory, neptune, Bronze medal on the opening of the locks at Katwijk in 1807. medal, Jean Pierre Droz, 1807, minted, General: 4.7 x 0.3cm (47 x 3mm), Weight: 50g, personification, weapon (sign), allegory, neptune, Bronze medal on the opening of the locks at Katwijk in 1807.](https://c8.alamy.com/comp/2DCHCB3/medal-jean-pierre-droz-1807-minted-general-47-x-03cm-47-x-3mm-weight-50g-personification-weapon-sign-allegory-neptune-bronze-medal-on-the-opening-of-the-locks-at-katwijk-in-1807-on-the-obverse-is-a-depiction-of-neptune-moving-across-the-sea-on-a-shell-shaped-victorious-car-drawn-by-seahorses-accompanied-by-triton-blowing-a-horn-on-the-left-is-the-river-god-the-rhine-with-a-cornucopia-in-the-left-arm-and-under-the-right-arm-a-jug-from-which-water-flows-below-the-image-the-inscription-feliciter-and-at-the-bottom-in-very-small-letters-the-name-of-the-maker-droz-f-to-the-2DCHCB3.jpg)
medal, Jean Pierre Droz, 1807, minted, General: 4.7 x 0.3cm (47 x 3mm), Weight: 50g, personification, weapon (sign), allegory, neptune, Bronze medal on the opening of the locks at Katwijk in 1807.
![medal, Jean Pierre Droz, 1807, minted, General: 4.6 x 0.4cm (46 x 4mm), Weight: 59.3g, horse, weapon (sign), Silver medal on the opening of the locks at Katwijk in 1807 The obverse medal, Jean Pierre Droz, 1807, minted, General: 4.6 x 0.4cm (46 x 4mm), Weight: 59.3g, horse, weapon (sign), Silver medal on the opening of the locks at Katwijk in 1807 The obverse](https://c8.alamy.com/comp/2DCHCA3/medal-jean-pierre-droz-1807-minted-general-46-x-04cm-46-x-4mm-weight-593g-horse-weapon-sign-silver-medal-on-the-opening-of-the-locks-at-katwijk-in-1807-the-obverse-depicts-neptune-on-the-right-seated-on-a-conch-shaped-victory-cart-drawn-by-two-seahorses-for-this-the-horn-blowing-triton-on-the-left-a-seated-river-god-the-rhine-used-to-the-right-with-a-horn-of-plenty-in-his-left-arm-his-right-arm-rests-on-a-jug-from-which-water-flows-below-the-performance-the-inscription-feliciter-and-above-it-the-inscription-instavratopriscorheniostio-marked-on-the-cut-on-the-2DCHCA3.jpg)
medal, Jean Pierre Droz, 1807, minted, General: 4.6 x 0.4cm (46 x 4mm), Weight: 59.3g, horse, weapon (sign), Silver medal on the opening of the locks at Katwijk in 1807 The obverse
![Medalist: Jean-Pierre Droz, 20-franc piece, Napoleon I, French, Medalist: Jean-Pierre Droz (French, La Chaux-de-Fonds, Neuchâtel 1746–1823 Paris), 1811, French, Gold, Diameter: 3/4 in. (19 mm.), Coins Stock Photo - Alamy Medalist: Jean-Pierre Droz, 20-franc piece, Napoleon I, French, Medalist: Jean-Pierre Droz (French, La Chaux-de-Fonds, Neuchâtel 1746–1823 Paris), 1811, French, Gold, Diameter: 3/4 in. (19 mm.), Coins Stock Photo - Alamy](https://c8.alamy.com/comp/2B0KH46/medalist-jean-pierre-droz-20-franc-piece-napoleon-i-french-medalist-jean-pierre-droz-french-la-chaux-de-fonds-neuchtel-17461823-paris-1811-french-gold-diameter-34-in-19-mm-coins-2B0KH46.jpg)
Medalist: Jean-Pierre Droz, 20-franc piece, Napoleon I, French, Medalist: Jean-Pierre Droz (French, La Chaux-de-Fonds, Neuchâtel 1746–1823 Paris), 1811, French, Gold, Diameter: 3/4 in. (19 mm.), Coins Stock Photo - Alamy
Medalist: Jean-Pierre Droz | 20-franc piece, Napoleon I, brockage reverse | French | The Metropolitan Museum of Art
![Jean Pierre Droz (1740-1823), engraver, after 1823 Eugène Dubois (1795-1863). Jean-Pierre Droz (1740-1823), graveur, après 1823. Bronze, après 1823. Paris, musée Carnavalet Stock Photo - Alamy Jean Pierre Droz (1740-1823), engraver, after 1823 Eugène Dubois (1795-1863). Jean-Pierre Droz (1740-1823), graveur, après 1823. Bronze, après 1823. Paris, musée Carnavalet Stock Photo - Alamy](https://c8.alamy.com/comp/2B99HGG/jean-pierre-droz-1740-1823-engraver-after-1823-eugne-dubois-1795-1863-jean-pierre-droz-1740-1823-graveur-aprs-1823-bronze-aprs-1823-paris-muse-carnavalet-2B99HGG.jpg)
Jean Pierre Droz (1740-1823), engraver, after 1823 Eugène Dubois (1795-1863). Jean-Pierre Droz (1740-1823), graveur, après 1823. Bronze, après 1823. Paris, musée Carnavalet Stock Photo - Alamy
![A Jean-Pierre Droz, inventor del método de multiplicar troqueles - Colección - Museo Nacional del Prado A Jean-Pierre Droz, inventor del método de multiplicar troqueles - Colección - Museo Nacional del Prado](https://content3.cdnprado.net/imagenes/Documentos/imgsem/50/502f/502faa2b-13fb-4bfc-8253-57b72390f5bf/97ae2bad-66d6-47ab-a51c-95409c91797f.jpg)