The ornamental design for oval hydrotherapy jet escutcheon, as shown and described.
FIG. 1 is a perspective view of the oval hydrotherapy jet escutcheon.
FIG. 2 is a first side elevation view thereof;
FIG. 3 is a second side elevation view thereof;
FIG. 4 is a third side elevation view thereof;
FIG. 5 is a fourth side elevation view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken line showing of parts of the drawings is included for the purpose of illustrating use and environment and forms no part of the claimed design.