I claim the ornamental design for a surface mount jamb with snap cover, as shown and described.
FIG. 1 is a perspective view of a surface mount jamb with snap cover showing my new design;
FIG. 2 is a left side elevational view thereof;
FIG. 3 is a right side elevational view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a front elevational view thereof; and,
FIG. 7 is a rear elevational view thereof.
The broken lines shown in the figures are included for the purpose of illustrating portions of the surface mount jamb with snap cover and form no part of the claimed design.