The ornamental design for handle for a deflectableendoscope, as shown and described.
FIG. 1 is a left side elevational view of a handle for a deflectable endoscope in accordance with my design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a right side elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is top view thereof; and,
FIG. 7 is a front, right perspective view thereof.
The broken lines immediately adjacent the claimed areas, shown in the FIG. 5 view, represent the bounds of the claimed design while all other broken lines are directed to environment and are for illustrative purposes only; the broken lines form no part of the claimed design.