FIG. 1 is an upper right perspective view of a base trim strip embodying my new design;
FIG. 2 is a right side view of the base trim strip of FIG. 1, the left side being a mirror image thereof;
FIG. 3 is a front view of the base trim strip of FIG. 1;
FIG. 4 is a rear view of the base trim strip of FIG. 1;
FIG. 5 is a top view of the base trim strip of FIG. 1; and,
FIG. 6 is a bottom view of the base trim strip of FIG. 1.
In the drawings, the base trim strip includes a symbolic break drawn in dot dash broken lines. The break lines and the area between the break lines form no part of the claimed design. The evenly spaced broken lines depict portions of the base trim strip that form no part of the claimed design.