Silver spoons labeled Argonid

[fisheyes20]

I have inherited a set 6 of large silver spoons labeled "Argonid" in what appears to be their original box. The only other identifier on the spoons is an arrow pointing to the left which I would assume to be a hallmark. In trying to research the origin of these spoons on the internet, the only pertinent result for Argonid is a Russian royal House. There are a number of references, mainly in German which resist the translation feature in Google. Any suggestions?

Thanks!