The ornamental design for a timer, as shown and described.
FIG. 1 is an elevated front perspective view of a timer, according to our new design;
FIG. 2 is an elevated rear perspective view of the timer shown in FIG. 1;
FIG. 3 is a front view of the timer shown in FIG. 1;
FIG. 4 is a rear view of the timer shown in FIG. 1;
FIG. 5 is a top view of the timer shown in FIG. 1;
FIG. 6 is a bottom view of the timer shown in FIG. 1;
FIG. 7 is a first side view of the timer shown in FIG. 1;
FIG. 8 is a second side view of the timer shown in FIG. 1;
FIG. 9 is a front view of the timer shown in FIG. 1 in a first alternative position;
FIG. 10 is a front view of the timer shown in FIG. 1 in a second alternative position;
FIG. 11 is a front view of the timer shown in FIG. 1 in a third alternative position;
FIG. 12 is a front view of the timer shown in FIG. 1 in a fourth alternative position; and,
FIG. 13 is a front view of the timer shown in FIG. 1 in a fifth alternative position.
The portions of the figures shown in broken lines are unclaimed. Any empty region surrounded by broken lines is also unclaimed, inclusive of the broken line itself.