If a silver ring is stamps with. "A 10 925 " what dose the A 10 mean?

Thats all I have its a silver ring with a big diamond like stone in the middle & three diamond like small stones on each side of the ring and on the i

That's all I have its a silver ring with a big diamond like stone in the middle & three diamond like small stones on each side of the ring and on the inside of the ring it is printed 10 A 925 I

or:That's all I have its a silver ring with a big diamond like stone in the middle & three diamond like small stones on each side of the ring and on the inside of the ring it is printed 10 A 925 I

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