This is the only illustration in whole of Über das römische münzwesen von Theodor Mommsen (1850).
And, it’s not even a product of the Roman mint but rather of Luceria (HNItaly 668 = Vecchi 333 = Haberlin 196 no. 2 Pl. 72.16). For good context see Termeer 2019. The iconography is likely borrowed from RRC 15/1, BUT we should bear in mind that earlier the same types were used by Arpi (HNItaly 633 = Yarrow 2021: fig. 3.1). Arpi is very close neighbor of Luceria.
The best known specimen is that in Berlin (below) once owned by Haeberlin, but the letter formations are slightly different (notice the R on the bottom left). It weighs 326.40g, almost exactly a Roman pound.