Hallmark letters RH inside a crown .only marking

British Silver What is it?
1

Hello,
I am new to the site and request some assistance in identifying two attractive pieces. Firstly they both have a hallmark on their base. It is a crown with the letters R H inside.They are quite small but unusually heavy. This is the only marking so it is probably not silver. I have found another link featuring the same marking but as yet no positive identification

silver-collector.com/topic2220.html

I have will shortly post photos. Unfortunately the ones I have taken are too large for uploading

thanks