Possible 18th/19th Century Italian Pottery From "Hollingsworth Galleries Costa Mesa, CA"

I recently came across this large green pottery bowl that I believe is from the 18th/19th century. The pottery is about 12" long, 10" wide, and 7" tall. Due to the brush stroke patterns on it Im almost certain that it has been hand painted and handmade . Under the base there is an oval golden sticker that states "Hollingsworth Galleries, Costa Mesa CA" which I was not able to find much information about the art gallery due to the fact that they closed their doors not so long ago. Can anyone provide more information on the possible age and origin of this pottery or even possibly more information regarding Hollingsworth gallery? Any and all information is greatly appreciated!