The ornamental design for a mahjongcharlestonaiddevice, as shown and described.
FIG. 1 is a perspective view of a mahjong Charleston aid device showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left view thereof;
FIG. 5 is a right view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a top view of an alternative position of the pivoting arrow thereof; and,
FIG. 8 is a top view of another alternative position of the pivoting arrow thereof.
The broken line showing of a bottom face in FIG. 1 through FIG. 5 is included for the purpose of illustrating environmental structure and forms no part of the claimed design.