In this 1947 recording, Pia Tassinari (1903-1995) and Ferruccio Tagliavini (1913-1995) perform "Parigi, O Cara, Noi Lasceremo" from Act III of Verdi's La Traviata. I created this video from the LP depicted above, issued on the Certa-Soria label, serial number 50.018. There is no indication anywhere on the LP which orchestra is accompanying the duo.
Also from this LP:
Pia Tassinari / Ferruccio Tagliavini: "Or Lasciami Al Lavoro" (Tosca): "David Hertzberg"