Happy Monday Cindy!
Thanks for the photos, they came through just fine this time, hopefully the site has sorted out the photo-attaching glitch for good.
This is a very pretty piece of Nippon art porcelain. I'll take your word for it that the bottom says "Hand Painted" and "Nippon". I can't see anything except a smudge, but then it is Monday morning. However, not to worry, the top screams authenticity and Nippon artistry at its very best. The shape in particular, with its superbly free-form rim and handle, is quintessential Art Nouveau.
Then there's the delicate lace-like flowers carefully rendered in moriage raised enamel on a backdrop of roses, softly out of focus, that makes the flowers on top seem to float in 3D. An unimaginable level of skill and dexterity with a piping bag and the steadiest of hands was needed to create that moriage, a skill that you would not find today for any money.
At the time this type of art porcelain was made, which was a short period from about 1900 - 1915, no-one in the West had seen decoration quite like this, and it was all hand done -no printing of cheap color decals as was being done in Europe- and so Nippon porcelain became an instance and enduring success.
Prices today are a little depressed from where they were when eBay first started because, again, nobody realized the sheer quantity of Nippon that was out there until it started appearing on eBay. Added to which, a tide of eBay buying has now turned into a tide of eBay selling, so it's a buyer's market when it comes to Nippon with some amazing bargains to be had.
Having said that, there's still a good market for the nice examples and yours is a very nice example. This one, for instance, sold on line (eBay) for $300 which is about right.
I would give yours an auction/eBay value in the range of $250 - $375.
Full retail/replacement/insurance value: $750.
Hope this helps!