The bird dials are the best known of Patek Philippe's cloisonné series, and Leadbeater's Cockatoo is among the more demanding subjects the Manufacture has taken on. The crest runs pink through yellow to red across a very small area, and in cloisonné each of those colours is a separately fired enamel held inside its own cell of gold wire. There is no blending and no correcting: a dial like this occupies an enameller for weeks, the kiln can destroy the work at any firing, and the failure rate is the reason so few of these ever reach a collector.

The rose gold case measures 38 mm with a plain bezel and no other ornament. The cockatoo is executed in cloisonné enamel over a gold ground, the wires forming the outline of the bird and the boundary between every colour. A self-winding movement shows hours and minutes, without a seconds hand or date to break up the scene. The watch is finished on an alligator strap. The 5077 is the enamel-dial Calatrava, a case used for no other purpose.

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