The example below is the result of etching and depositing layers of copper, brass and silver.
A black nickle oxide is left in the crevices, after being polished off the surface, and outlines the design.
This process creates a three-dimentional effect of constantly changing colors.
These plates are usually 11 inches ( 27.94 cm. ) in diameter.
What did Reed & Barton call them ?

Pat.
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