This is a blue opalescent glass in the hobnail pattern. Research has shown it was produced in 1954.This is a very rare item!!! There are a few scratches on bottom part of dish which I have marked in the pictures and a small chip on very bottom part of dish but the top is flawless! The item "Fenton Blue Opalescent Hobnail Butter Dish with Cover Rare" is in sale since Wednesday, January 24, 2018. This item is in the category "Pottery & Glass\Glass\Art Glass\North American\Fenton". The seller is "redztang" and is located in Bristol, Virginia. This item can be shipped to United States.