Stamp collecting: The mistakes worth millions

By Leisha ChiBBC reporter, Singapore26 May 2016To play this content, please enable JavaScript, or try a different browserVideo caption, Investors are taking a closer look at rare stampsWhile growing up in a village in Singapore, Richard Tan and his brothers used to rummage through their neighbours' rubbish bins looking for discarded letters.They wanted the foreign stamps on the envelopes, which to them provided a small window on a much wider world.Several decades later, Mr Tan has turned that..