 ISO originally assigned a new currency code of "ZWN" to this redenominated currency, but the Reserve Bank of Zimbabwe could not deal with a currency change, so the currency code remained 'ZWD'.The revaluation campaign, which Gideon Gono named "Operation Sunrise", was completed on 21 August 2006.It was estimated that some ten trillion old Zimbabwe dollars (22% of the money supply) were not redeemed during this period.