These plates were ordered for Emperor Guangxu birthday useage with Guangxu marking on the base.
Before China opened up in 1986, piles of late Qing Palace wares were selling at few USD each.
Now, these wares of better quality and design are commanding respectable prices at auctions.
I bought this pair from an ex-ambassador who got them from a London minor auction paying a few pounds in those days.
Price : POA