This a wonderful antique diamond platinum engagement ring by Je Callwell & Co. The ring is centered with gorgeous old mine cut diamond that weighs approximately 0.45ct. The color of this diamond is F with VS1 clarity. The center stone is accentuated by sparkling round cut diamonds that weigh approximately 0.35ct. The color of these diamonds is H with VS clarity. The ring has gorgeous open work, milgrain and filigree design. The size of the ring is 3 1/2 and it can be resized. The ring is stamped J5209 JEC & Co.