I'm thinking of buying this Greek tray that's marked "Nissiotis 925." Given my previous run-in with fake Greek silver, I wanted to get the expert opinions again in regards to this piece. Does 925 here still denote that it's solid sterling, or could it also mean that it's silver plated/filled? Also, I looked up Nissiotis online, and they seem to be a legitimate silver maker. However, most of their pieces are silver-plated, and their mark looks different from this one. Also, if it's indeed Greek, it doesn't have the city registration marks. It just looks a little suspicious overall, but seems to have nice patina. The piece weighs 122 grams, and is 5'' by 5'' and 2'' tall. The images are below. Thank you in advance.