Roman art, 2nd-3rd century Roman carnelian... Lot 17

Roman art, 2nd-3rd century Roman carnelian intaglio mounted on a modern gold ring. Bust of Serapis. Bust of Serapis in profile, bearded, with hair banded with a headband. He wears his modius on his head. Around, Latin letters in retrograde writing "P, N, S". Dim_ 1,2 x 1,6 cm Weight: 8.2 g 18k gold setting. Eagle head punch Inventory number incised inside the ring "3571". A roman carnelian intaglio with Serapis bust and latin letters, 2nd-3rd Century a.d, mounted on a modern 18K gold ring.