Roman, 3rd - 4th century AD.
Ring size F 1/2 UK / 3 US.
Weighs 3.8 grams.
The ring is extensively engraved with the following latin words and approximate translations:
Left shoulder - ‘REBET ?IA SESTE’ - It is rebated.
Bezel - ‘VIVAS CV MCA ECI’ - Live with me.
Right shoulder - ‘CAFELIX ET CVM RTIO’ - Safe and comfortable.
A similar example can be found in the collection of the British Museum, Registration number: AF.205.