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In fact I think all of the decorative swirls have been made from copper wire.
Really? I think they really are engraved. You can´t see them overlapping, which would result in an additional height of those ornaments, and they are almost all the same, indicating the same graphic has been used on all of them. Another gripe of mine that the one in the vertical center to the right is the same as the longer ones in the corners of the lid