The lid opening, the face engraved with astrological signs.Folding engraved string with engraved tables on underside and face.To use the sundial one first needs to set the instrument on a flat surface and rotate it until the needle on the compass is correctly aligned in a north-south direction. When the metal pin is due north then the string is properly aligned towards the north-pole and the sundial will indicate the correct time – but only for the latitude for which it was constructed. 14.5 by 2.2 cm