Irving Rice had glass made in Czechoslovokia before starting his relationship with Imperial Glass in Bellaire, Ohio, about 1939. The moulds for perfume bottles, stoppers, trays, etc. belonged to Rice, and he was a "private mould" customer. This perfume bottle is indeed from the Rice line, and it may come with several different stoppers, including the one shown. Fenton Art Glass now owns this perfume bottle mould as well as moulds for various stoppers.