TWO batches of counterfeit $10 coins have hit the territory - the first fakes since the coin was launched last year. Police Commissioner Eddie Hui Ki-on alerted the Executive Council this week after a bank employee found fakes in cash taken from a charity collection box. A total of nine counterfeit coins - made with relatively advanced techniques - have turned up. One of the batches uses two metals, making it remarkably similar to the real thing. The other is made from one metal, with the central part painted gold. But Detective Superintendent Peter Bunning of the Commercial Crime Bureau said: 'Nobody pays much scrutiny to $10 coins where they would be perhaps paying attention to the $500 or $1,000 note. 'So from that point of view, it is obviously a danger.' Some of the coins are being held by the Hong Kong Monetary Authority - which is responsible for ordering, designing and issuing the coins. Another lot has been given to the Government Laboratory for chemical testing to assist the police investigation. The test results are not yet available. A spokesman for the Monetary Authority said the matter was being examined, but stressed the issue was insignificant. The coins, which feature the distinctive bauhinia flower symbol in the centre, were first released last November. About $600 million in $10 coins is now in circulation, a fraction of the estimated $4.3 billion in $10 notes being traded. A spokesman for Swire Bottlers, which operates 5,000 vending machines, said it was concerned at the find. 'But we are confident our machines, which have sensors to detect weight and thickness of $10 coins, would reject any bad coins,' the spokesman said. 'Obviously, we would want this matter to be fully investigated.' A spokesman for the Mass Transit Railway said it would also carefully monitor the police inquiry.