Monoplane aircraft Art Deco period diamanté badge and case

A superb circa 1920's period fine quality rhodium plated 'Aeroplane brooch', set with paste diamonds and cut glass stones; housed in what appears to be its original velvet lined fitted case with maker's details to lid 'By Appointment' 'Skinner & Co Diamond Merchants 34, Old Bond Street, London, W.'. Complete with original pin fittings incorporating safety roller catch, revolving propeller and complete with all stones. A truly beautiful brooch in exceptionally clean condition. Length 30mm.