The little slab is a part of an engraved surfaces group. The figure is constituted by a spiral prosecuting in a meandering line. The pecking is much better preserved in the underground (few cm) part. The figure (and all the meandering figures of this area) is very similar to the meanders and spirals of the close Haute Maurienne French valley (Plan des Glières, Arcelle Neuve sites), where the altitude of the engraved areas is much more higher (over 2000-2000 m).

This is a problematic subject to be dated. It's possible to find a double chronological attribution: Neolithic-first Copper Age (by comparison with the meanders and the spirals of the Irish passage graves and of the megalithic art) or Bronze Age - First Iron Age (by comparison with the engravings of the Haute Maurienne French valley where such patterns seem to be related to the Iron Age topographical compositions). The study of the superimpositions in the Valsusa area testify that the meandro-spiralic pattern is overlapped by late Iron Age figures, like axes.