![The Stopping Valve: The Best Invention Ever | Horn Matters | A French Horn and Brass Site and Resource | John Ericson and Bruce Hembd The Stopping Valve: The Best Invention Ever | Horn Matters | A French Horn and Brass Site and Resource | John Ericson and Bruce Hembd](https://i0.wp.com/hornmatters.com/wp-content/uploads/2009/11/StopValve-241x300.jpg?resize=241%2C300)
The Stopping Valve: The Best Invention Ever | Horn Matters | A French Horn and Brass Site and Resource | John Ericson and Bruce Hembd
![French Stölzel valve horn with two valves, after Antoine Halary c. 1830 — Natural Horns by Richard Seraphinoff French Stölzel valve horn with two valves, after Antoine Halary c. 1830 — Natural Horns by Richard Seraphinoff](https://images.squarespace-cdn.com/content/v1/601752fa2e514a5b86edf455/1613633514287-CZX4FHQQQKPFJR51SHN1/20191230_124833-1.jpg)
French Stölzel valve horn with two valves, after Antoine Halary c. 1830 — Natural Horns by Richard Seraphinoff
![The VALVE HORN (French : Cor a pistons) was introduced in the 1830s and completely replaced the Natural Horn used by Mozart and Beethoven Stock Photo - Alamy The VALVE HORN (French : Cor a pistons) was introduced in the 1830s and completely replaced the Natural Horn used by Mozart and Beethoven Stock Photo - Alamy](https://c8.alamy.com/comp/2M9BGW1/the-valve-horn-french-cor-a-pistons-was-introduced-in-the-1830s-and-completely-replaced-the-natural-horn-used-by-mozart-and-beethoven-2M9BGW1.jpg)
The VALVE HORN (French : Cor a pistons) was introduced in the 1830s and completely replaced the Natural Horn used by Mozart and Beethoven Stock Photo - Alamy
![228928 20QE29317 86RD13A Air Horn Control Valve Replac. for Mack USA M – Moltoparts Truck Parts Miami 228928 20QE29317 86RD13A Air Horn Control Valve Replac. for Mack USA M – Moltoparts Truck Parts Miami](https://moltoparts.com/cdn/shop/products/tru0142-228928-20qe29317-86rd13a-air-horn-control-valve_1024x1024.jpg?v=1608043729)
228928 20QE29317 86RD13A Air Horn Control Valve Replac. for Mack USA M – Moltoparts Truck Parts Miami
![French Horn made by Alexander, (unlaquered instrument), with Rotary valves, and B flat valve Stock Photo - Alamy French Horn made by Alexander, (unlaquered instrument), with Rotary valves, and B flat valve Stock Photo - Alamy](https://c8.alamy.com/comp/ERFP4X/french-horn-made-by-alexander-unlaquered-instrument-with-rotary-valves-ERFP4X.jpg)