Vintage jadite butter dish shops and lid swirl

Product Name: Vintage jadite butter dish shops and lid swirl
This is a jadite butter dish and lid. I don't know the year. The bottom is pretty heavy, And thick. it is a swirl pattern. The top is a different color green it's lighter. It has the word butter imprinted shops on the top. Little guy has three out of the four corners chipped. I have one of the chips. When it's right side up on the base you can't see chips. The picture where the top is upside down, is the one that shows the best angle of the chips. cross cross pattern. .