Was the object printed in "vase" mode?
It looks like the walls might be 2 layers thick, so I can't tell.
If the walls are more than one layer thick, then did your slicer tell your printer to print some groups of outside layers clockwise and others counter-clockwise? If so, then something might be slightly loose/slack. One easy test is with the hotend cool, to move the effector to (x=0, y=0, z=100), leave the motors energized, and put your finger on the tip of the nozzle and try to move it in all six directions (up, down, left, right, forward, back). If there is any movement, that is a clue about what to fix.