What do these hallmarks mean?

[SouthWestmom]

I think 925 is silver? Bought in Greece.

These sorry

925 denotes sterling silver.

Thanks Paddington that's reassuring! It's very light.

CAO ~ Cyprus Assay Office

Is that like a brand?

I'm too lazy to google .

Oh thank you that's interesting. I didn't realise it wasn't just a thing they stamped at the jewellers.