Unusual Floral Dish

This is a really nice serving or dessert dish made in England in the early 19th century. I could not find another piece like it so I am unsure as to the maker. Love the pattern! The piece has a nice shape to it wwith a relief design to the edge and a handle to one side highlighted with gilding. The rim of the plate has a yellowish ground color to it with four different colorful designs over it with another design in the center on white ground. The designs seems to be printed in puce and then hand painted over that with some of the other colors to give it more depth. Companies like Ridgway , Daniel , Davenport , Coalport or possibly Copeland come to mind and maybe someone out there knows and could shoot me an email. I would certainly appreciate it! A really nice looking piece! The dish is marked underneath with a pattern number in red (I think it says 420) as well as what looks to be an artist mark. Unmarked pieces are fairly normal during this period of English porcelain. The dish is in great condition with two small chips to the edge right next to one another and mostly on the underside as shown with jus a bit visible from the top. There is also an old firing crack to the edge as shown from when the dish was made. Minor touch of gold wear as well. The dish is 1.75 inches tall, 9.5 inches wide and 9 inches deep. Please email me for more information or other pictures.