Pérez, Nicolás. "A Beam Engine of the Watt Type." 27 August 2004. Description: The Watt-type beam engine, constructed by D. Napier & Son in 1832, powered the coining presses of the Royal Spanish Mint from 1861 to 1891. It was later donated to the Higher Technical School of Industrial Engineering of Madrid in 1914 and installed in its lobby. Source: Enciclopedia Libre. References: Ricardo Donoso Cortés (1914 May 16). "Los sueños de Jaime Watt". La Esfera I (20): 22. Santiago López García (02 2019). Diseño de la máquina de la ETSII con CATIA (PDF). Archivo Digital UPM 40 and 47. ETSII.