A company in Birmingham's Jewellery Quarter is making commemorative coins for American presidential hopeful Barack Obama. And if the Democratic candidate is elected to become the most powerful man in the world on November 4, it could open the floodgates for millions of pounds worth of business for the firm. Windsor, Elizabeth & Windsor has already sold more than 300 limited edition commemorative silver coins to the Democratic Party to hand out to key members of the campaign to elect Obama. The contract is worth about £100,000 to the company, based on Warstone Lane, Hockley. And a spokesman for WEW...