Well,, The first one is not the old Royal Vienna and is likely an import !! It would have had a stick on label with the mfrs name and country of origin !! Many of these are from China but there are some from other Austrian mfrs !! The Royal Manufactory lasted only until 1864 I think!! Some refer to these as Royal Vienna style !! Others used the beehive mark so not much way to know which actually made yours !! It is very symetrical so I am betting its a Chinese import !! The next is a style that was common to the 1940`s !! No way to know who made it !! The number on the bottom would be the shape or mold number !! The blue mark is the decorators mark !! Next has no mark at all and unless you know the hundreds of thousands of pottery patterns no way to guess who made it !! But if you go to replacements.com,, they have a free matching service and may be able to find it for you !! Last is the blue and white plate of which many have been made !! The blue mark on back is another decorators mark !! Looks to have some age to it but I do not recognize the work !! Could be from England or Holland but that is just a guess !! Hard to tell but it looks like it may be Staffordshire pottery !! Thats about as much as I can tell from the pics !! Hope it helps a bit !!