My Fenton books says that several companies did hand decoration on Fenton pieces. "Most notable was Abels, Wassreburg & Co. whose 'Charlteon' flowers adorned Peach Creat and other pieces....Another company that purchased Fenton blanks was Beth Weissman whick bought Silver Crest and decorated it with pink flowers and blue bows reminiscent of Westmoreland's decorations."
There are about 4 pages which show all kinds of handpainted items, including 5 variations of your pretty bowl. I think you can safely say your item is Fenton and was done by one of those two decorators. The book also mentions most of the outside decorations were done from the 40's and into the mid 50's.
Lisa