Beautiful blue white opalescent glass, the dimensional pattern of interlocking keys allows more light to be refracted through the glass and low for more color to how. The button knob on the top shows more blue opalescent color.
The bottom is probably not an original to the top. It is plain crystal clear glass, shaped in the traditional shallow saucer style. The top is about 5 3 /4 in diameter measure to the outside walls. It measure about 4 tall without the bottom. With the bottom in place it measures about 5 1/3 tall.The item "EAPG Greek Key Blue White Opalescent Covered Butter Dish" is in sale since Wednesday, July 24, 2019. This item is in the category "Pottery & Glass\Glass\Glassware\EAPG Pattern Glass 1850-1910\Colored". The seller is "johine89" and is located in San Antonio, Texas. This item can be shipped worldwide.