Help identifying gold hallmarks

[johnf1977]

Hi can anyone help to identify the hallmarks on my two gold rings I've been told they are 9ct gold and 1 ring has diamond and garnet stones and the other has diamond and tanzinite, if anyone can help to identify the hallmarks for the maker and year of the rings I would be extremely grateful. Thank you 

[Rll1288]

375 is 9 Karat , Crown denotes gold .. can't make the other things out but the first mark is probably makers details can't see the date marks properly but the second ring looks to have an "H" which looks like 1982..

 

[sixgun]

The style of the H is that of 1982

The makers mark looks like A C. Co - i am not certain about o of Co

It would help if the other side of the maker's mark was visible to see what the surround was like.