František Zemek ( 1913 - 1960 ) Art Glass sommerso large bowl designed by master Frantisek Zemek( 1913-1960) for Mstisov,Moser glassworks as a part of the Rhapsody series range with its trademark colors of blue, green, yellow, amber and electric blue encased in a heavy clear glass body. It is large size. "Sommerso" -- which means "submerged" -- is a technique that creates colored layers of glass immersed or submerged in a colorless layer of glass. All details you can see on photos.On his age is in excellent condition.