Ad blocker detected: Our website is made possible by displaying online advertisements to our visitors. Please consider supporting us by disabling your ad blocker on our website.
I noticed what looks to be a third mark on the flat section of the lid. Could you upload a closer image of it please, as it may help in determining place and period of manufacture.
You have asked if is solid or plated and also (in the heading), the age and purity. I'm not an expert, but am able read the mark for solid 800 grade silver.
What I believe should be the date character does not correspond with what I expect, but the third mark may help.
The second mark should be date letter in Arabic (after 1940).National mark ``Cat`` or ``Lotus flower`` is also seen in Egyptian silver. The inscription above Λοο (800) stands for Cairo.