Help with Hallmarks on silver bowl and plate

I purchased a pair of small bowls with matching plates from an estate sale and am having a hard time identifying the hallmarks. Help please … and thank you!

“Etain” is French for pewter and the stamp at top left indicates the amount (95%) of tin (Sn) in the alloy. So not silver I fear.

Do you know of a good pewter web site that I can use to do further research? I have been told that old pewter is very collectable. Thanks in advance.