Abstract: A device is provided for supporting an egg-shaped article for adjusted angular displacement about its major dimension center axis and guide structure is provided paralleling the axis and having a follower supported therefrom for movement therealong. A marking instrument is supported from the follower for movement along a path extending toward and away from the axis and intersecting therewith in a plane containing the axis and the marking instrument and follower also include structure for selectively supporting the marking instrument from the follower for movement toward and away from the axis in planes paralleling and spaced equally on opposite sides of the first mentioned plane.