Just doing a bit of tidying up on some older threads, mainly for the benefit of anyone searching the site for information.
This looks to be .800 fine silver from the Hanau silver industry in Germany and likely from the first half of the 20th Century. The three chevrons are part of Hanau’s coat of arms but Hanau marks are problematical because there was no administrative office for registration and consequently no records against which they can be checked. One maker known to have used the three chevrons in a circle as his trademark was Georg Rüttinger, (founded 1926) but the mark is usually accompanied by a “G over R in a circle” mark for this maker.