FRANKFURT, Sept 2 - The European Central Bank said on Tuesday foreign currency reserves of the euro zone central banks in the week ending August 29 remained almost unchanged while its gold holdings were also unchanged. The net position of the ECB and euro zone central banks in foreign exchange reserves totalled 195.3 billion euros at the end of the reporting week, the ECB said in its regular weekly consolidated financial statement. Gold reserves were unchanged at 119.79 billion euros, the bank said. //