As the LP notes, this is not high-fidelity sound. This is IRCC LP7006, issued in 1955, containing transfers of a number of Mapleson Cylinders, recorded live from the stage of the Metropolitan Opera House from 1901 to 1903.
Bréval appears on the following tracks:
14. Meyerbeer - L'Africaine - Duet, Act 4 (Three fragments) Lucienne Bréval, soprano; Jean de Reszke, tenor. Philippe Flon, conductor 15/3/1901