Abstract: A pre-inked hand stamp includes a platen carrying a microporous imaging member on its lower portion and having a centrally located threaded stem extending upward from its upper portion; an upper case member having an open bottom and a centrally located opening in its top, the stem of the platen extending through the centrally located opening; a spring and an adjustable stopping assembly coaxially mounted on the stem; and a handle threadably coupled to the end of the stem. The adjustable stopping assembly includes: a lower base member which is mounted in the central opening of the upper case member, a rotatable member which is mounted on the lower base member, and an upper threaded member which is mounted in the rotatable member, engaging it with a spline and groove structure. Rotation of the rotatable member causes rotation of the upper threaded member which results in movement of the upper threaded member along the threaded stem.