POLAND - CIRCA 1959: A stamp printed in Poland issued for the International Esperanto Congress, Warsaw and birth centenary of Dr. L. Zamenhof shows inventor of Esperanto Ludwig Zamenhof, circa 1959.
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POLAND - CIRCA 1959: A stamp printed in Poland issued for the International Esperanto Congress, Warsaw and birth centenary of Dr. L. Zamenhof shows inventor of Esperanto Ludwig Zamenhof, circa 1959.