Italian, 14th century.
Ring size U UK / 10 US / 62 EU.
Weighs 7.3 grams.
The bezel is engraved with an eagle and a palm frond to the centre, representing Saint John the evangelist. Around the central image are the letters ’S V S V S V C V’, which could either be an abbreviation of a motto, magic protective symbols or nonsensical.
A comparable example is in the collection of the British Museum, Museum number: AF.573
https://www.britishmuseum.org/collection/object/H_AF-573