The mark consists of the overall three-dimensional configuration of the combination of elements on a lower boom on a machine. One element is a curved turret side plate. A second element is a rounded lift cylinder plate with two concave sides of different length. A third element is a knuckle plate with three rounded sides. The matter shown in broken lines depicting the elements of the machine are not claimed as part of the mark. The white background is not claimed as a feature of the mark.