Hi Joe, it is simply marked 935 in the centre of the reverse. I bought it some years ago from a well known dealer. It was described as being unmarked but probably high silver content. I got it out of the bag and the first thing I saw was the content mark. One of those "Yeessss" moments as it cost very little. Somehow it's one of those pieces that froms the core of my collection. I don't have the means to amass a large collection so find myself buying and selling a lot and my collection is in a permanent state of flux. Somehow I just cannot part with this one and know I'd regret it if I ever did. Not that it's anything world-meltingly special it just has that something about it.