According to date mark, it seems the ring is from the year 1886 or 1911! Please refer to the final image!
15ct Gold Ruby and Pearl Ring.
Hallmarks: 15 Plus British Hallmarks
Ruby Diameter: 2.7mm Each Approx
Pearl Diameter Approx:
1 @ 3.2mm
2 @ 0.9mm
Ring Weight: 1.84 grams
Ring Face Width: 4.55mm
Ring Size: Q
Resizing Service Offered at Small Cost
Note: Antique or vintage rings may have wear associated with the items age.