(PhysOrg.com) — Is stamp collecting only of interest to passionate hobbyists? Far from it. Stamps can be a valuable addition to an investment portfolio, generating average long-term yields of up to 7 percent per year.
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Japan to introduce forgery-proof revenue stamps – NHK WORLD
Japan to introduce forgery-proof revenue stampsNHK WORLDJapan's National Tax Agency will introduce anti-counterfeit revenue stamps …