The St Petersburg arms have the anchors in what appears to be vert rather than argent. The current version of the CoA looks like this:
All in all I am left with very mixed feelings about this collection. It was nice that back in the 19th century the railway company thought to use heraldry to brighten up its new station. But oh dear, whoever was charged with doing the research let them down. In his defence (for I guess it was probably a man) he did not have access to the internet of course, nor almost certainly to any books containing colour plates. Unfortunately he was no heraldry buff as he would otherwise have questioned some of the tinctures and would surely never have got Vienna wrong.
Thank you Ton for sharing these pictures with us.