The words HARN STE engraved in the neck roll of the helmet could indicate the place of origin of the first owner, perhaps the town of Aharnam, the current Civitella d'Arna, near Perugia

The great majority of the Sangiorgi gems were acquired before World War II, and many derive from notable earlier collections amassed by Lelio Pasqualini, the Boncompagni-Ludovisi family, the Duke of Marlborough, and Paul Arndt in Munich.