Hi Bob, This is a Japanese general revenue stamp. There was one like this with no watermark in the 1898 set and a similar one with a pattern of horizontal zigzag lines watermark in the 1915 set.
Hi Bob, If this stamp is green, it is Barefoot Cat.#28 in SOUTHEAST ASIA REVENUES 2006 edition. Value .50p
Thank you for your help on this. I am amazed at how helpful and efficient everyone is on this site. Many thanks!
