925 Silver Cat series - Cats Ring
Opening the ring, regardless of size, have larger openings adjustable small
Ring Cat 1
https://scontent-hkg3-1.xx.fbcdn.net/t45.5328-0/c0.0.540.540/p180x540/14965838_1217826361608089_7179498904298192896_n.jpg
Cat Ring 2
https://scontent-hkg3-1.xx.fbcdn.net/t45.5328-0/c0.0.540.540/p180x540/14965806_1174674385927613_578019683697950720_n.jpg
Origin / manufacturing methods
China
