Can you show better close up images of the marks ? My conclusion was based on what I have seen in your images; assay office letter cannot be seen, kokoshnik head blurry, 84 distorted.
Thank you all for your help I think you are right that it isn't genuine Russian marks. I can get a slightly better picture where you can see a blurry assay office letter but it and the head are definitely not as sharp as the sample images on the site.
Thanks again