As you've been able to identify, the first one is by Thomas Prime, and they're his EPNS/silver plate marks. The "A1" mark at the bottom signifies that it's made from the top grade of silver plate, and the rest are spurious marks designed to give the impression of silver. The crown for instance could be taken as a reference to the mark used at the Sheffield assay office. The second piece is solid silver. Reading from left to right, the "crown and moon" are German assay marks for silver, and the "800" signifies the grade. The "D" is probably the maker's mark, and the last one on the end I am unable to identify. I suspect it may be an import mark, given it also has an "800" stamp as part of it. The crown and moon were introduced in 1888, so your piece dates to no earlier than that. Given what I can see, I'd put it at around 1910 in date. Hope that helps.