This is a very fine piece by the spanish art nouveau jeweller, Masriera. Expert craftmanship in the use of enamel, his translucent modernist designs have earned him the title of the "spanish Lalique". A museum sponsored by the family is now open in Barcelona. The best antique dealer for Masriera is Marta Alcolea in Barcelona and Madrid.
The piece displayed here is for sale at Bentley and Skinner, London.