AS has been said, it's Japanese Cloisonne - enamelled metal. If it was by a top artist it would be signed. Difficult to date from the photos, but they're traditional form; made any time from late 19th Century to today.
I can't tell from the photos if the flowers and birds have simply been painted over the top of the green enamel, or if they are themselves enamelled. If the latter, then it's proper cloisonne.
If there's is any form of damage then the value drops like a stone, and they are easily damaged by bumps and dings and corrosion of the metal underneath the enamel.