A diamond buckle ring, 1915, a diamond bombé ring, circa 1960, and a diamond butterfly brooch

A diamond buckle ring, 1915, a diamond bombé ring, circa 1960, and a diamond butterfly brooch
1st: The 18 carat yellow gold strap accented by a brilliant-cut diamond buckle, 2nd: Of textured foliate and openwork design, with single-cut diamond accents, 3rd: Set throughout with brilliant-cut diamonds, 1st with London hallmark, ring sizes: 1st approx. P (leading edge), 2nd approx. E (hoop off round), brooch length 3.1cm (3)