Vivaldi-Casals, 1929

I was researching a story I'm writing set during World War I. While trying to see which records soldiers would have been listening to, I came across this beautiful recording of a Vivaldi piece played by Pablo Casals.

(Musicology note: Although it's too late for WWI anyway, I looked it up: the major re-discovery of Antonio Vivaldi came later in the 20th century. But according to Wikipedia, a Fritz Kreisler piece in the style of Vivaldi set a mini-trend earlier, which is when Casals recorded this.)