www.925-1000.com

It means it is sterling silver plated with rose gold.

It is a shame the mark is too small to see, even saving the image and blowing it up does not help as it remains unidentifiable. What I can tell you though is that this is not a sterling silver piece, it is an alpaca piece.

As time goes by and you study more and more sterling silver pieces you will find you will be able to identify alpaca at a glance, it has a very different look than real sterling silver. The piece being questioned in this thread is a well known alpaca design and it looks as if someone did indeed late...