This vase is gorgeous and incredibly detailed. It resembles and is marked by an CN that signifies Camille Naudot- but upon research I've discovered this is false.
During the late 1800's and early 1900's, there was a large Japanese import business. This is not the one you see today in 'Made in Japan', those pieces were made after 1921.
The ones being produced before then were made by masters of porcelain. In fact, it was the Japanese who discovered many processes in porcelain.
The problem was, they sent so many Eastern influenced items, the market was dying down in the US. They discovered they could copy other makers and market those items and sell much more sometimes than the original makers! Their artistry was just that good. Copied too was the marks of makers. It makes it very hard today to find original makers on some items.
