This is a very old style ring. These rings and other ornate rings were attached to one end of the 10 bead prayer chain and moved from finger to finger as the decades were prayed to complete a full rosary of five decades.
This ring is a size 8.
Small oval image is of Our Lady of the Rosary along with Jesus holding a rosary (surface worn from loving use). It may be attached to a ‘tenner’ chaplet or worn alone to count prayers.
BASQUE (feminine) represents a region of Northern Spain / Southern France. Mary appeared to her children over a period of time in several areas of the Basque country.