 During this period, the old currency was denoted by 'K', whilst the new one was denoted by 'KR'.After the six-month period, the 'KR' symbol was dropped, and the new currency was referred to by the 'K' symbol.By June 26, 2013, the Bank of Zambia managed to withdraw 3.7 trillion Kwacha in old banknotes, accumulating to about 95.3% of the circulating banknotes.