This may help.
Although it looks plated, the first spoon is actually silver, although only .813 fine. I wouldn’t rule out it having been silver plated on top of that lower fineness base. It’s from Finland. The first symbol is the maker mark, which I can’t discern from your picture, followed by the crown as the Finnish state guarantee mark and then ‘813H’ to denote the fineness of the silver. The ‘H’ is for ‘Hopea’, which is the Finnish word for silver. Then the weird ‘A’ with a bar on top is the assay mark for the city of Turku, followed by ‘Z5’ as the date code, which is 1929.
The second spoon is indeed silverplate. It’s Wm. Rogers ‘Starlight’ pattern from 1953. The ‘IS’ is for the International Silver Company, who owned the rights to the Wm. Rogers trademark and the ‘AA’ is a quality mark for the thickness of the electroplate.
The third one is also silverplate from International Silver, using the ‘Original Rogers’ branding. It’s their ‘Hutton’ pattern from 1960.
The two ‘Rogers’ spoons have next to no value in that condition, I’m afraid. The Finnish spoon probably only has melt value derived from its silver content, but might be saleable for a little more if it polishes up OK (but if it has additional plating that would need to be polished away to the extent that the spoon is no longer ‘patchy’)
You didn't show any backmarks for the last spoon. Does it have any?
