A Favorite Classic few have heard

The Donna Diana -- Overture.
Composed by Emil Nikolaus von Reznicek - 1894

Conducting DaYe Lin and the Sinfonieorchester (Frankfurt Radio Symphony Orchestra).

It was the theme song of Sergeant Preston of the Yukon, and his wonder dog King. The series was first heard on radio January 3, 1939 as a half-hour long early American action adventure series, Later broadcast on TV in color on CBS from September 29, 1955, to September 25, 1958