Chabouillet, Anatole. Catalogue général et raisonné des camées et pierres gravées de la Bibliothèque impériale. Paris : 1858, n°1531.
I think it likely by the by that this gem was originally in the Medici collection based on Gori’s illustrations.
Most of the trees on the intaglios are leafy and bear no visual relationship to RRC 235/1.
Notice also that the tree has a bird in it. The catalogue says a woodpecker but this is a stretch of an assertion. I’ve been obsessed by the bird question before.
This is by far the closest visual parallel I’ve found. And interestingly it provides a parallel also for the head on this Sard in the Etruscan style for the BM (1814,0704.1319).
wolf and twins