Need your help to ID this large art pottery pot. incised design with enameled dragonflies. measures ( 17 1/4" inches H x 13 1/2' W ). I've never seen this mark - hard to find. Is it Japanese Modern - Studio Pottery ??? The last 2 photo's are of the marks - and then the marks upside down. Any guesses - By Who & Where. Thanks for you're help. rbjr 
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