Spanish orchestra based in Madrid, founded in 1903, this is the oldest private Spanish symphonic orchestra not related with a theatre (Barcelona's Orquesta del Liceo was founded in 1843). It was founded by members from the Sociedad de Conciertos, the first Spanish Orchestra, founded by in 1866. Acronym OSM.
In 1905 they started a collaboration with as conductor. Other conductors have been: , , , , and .
Since 1965 to 1997 played in and recorded to Hispavox label many zarzuelas in late 1960 to mid 1970s.
Since 1997 is related as (holder orchestra) of .
Do not confuse with .

List of General Music directors[/u]
Alonso Cordelás (1903–1904)
(1905–1936/39)
(-)
(1940–1945)
(1946–1950)
(1951–1958)
(1958–1977)
-
Luis Antonio (1999–2001)
(2002-2010)
(2015-)