Thanks for that. I will have a stab, though I am by no means an expert on Oriental pottery. I would say the backstamp is a very abbrevaited / stylised version of the Nippon backstamp (ie Japan).
Have a look at this page -
http://www.gotheborg.com/marks/20thcenturyjapan.shtml
under Nichi Hon (Nippon)
The style of the vase is commonly known as Kaga - this is fairly typical example but I am afraid that I would not know wheter it is really made in Japan or is a copy from say a Bohemian pottery. I would think it dates as I said from around 1900 to pre WW1.
If it is a Japanese vase then it was definitely made for the Western market, with the flower painting of Western flowers. The Kaga really refers to the shape - a round body, with a slender neck and often attached pierced handles. There were painted panels and profuse gilding. The early Japanese examples are very fine; as they became very fashionable - Japonism and the aesthetic movement from about 1880's on - the style was extensively copied. My grandparents had very similar vases on their mantlepieces which probably came from their parents, and indeed when we were furnishing in the Victorian style back in the 1970's, we had quite a collection. Yours looks very decorative and looks quite an imposing size - I can't tell about the condition - there is often colour loss, paint flaking. My husband would say if you had the other one (they invariably came in pairs to place each end of the mantle piece) it would be worth more!
Someone with more knowledge may come along.
