The nakfa (ISO 4217 code: ERN; naḳfa, or or نقفة nākfā) is the currency of Eritrea and was introduced on 15 November 1998 to replace the Ethiopian birr at par. The currency takes its name from the Eritrean town of Nakfa, site of the first major victory of the Eritrean War of Independence. The nakfa is divided into 100 cents. The nakfa is pegged to the US dollar at a fixed rate of US$1 = ERN 15. At earlier times, it was officially pegged at US$1 = ERN 13.50. The currency is not fully convertible, so black market rates available on the streets typically offered a rate of 15 nakfas per dollar. Between 18 November and 31 December 2015, the Bank of Eritrea began replacement of all nakfa banknotes. The banknote replacement initiative was designed to combat counterfeiting, the informal economy but primarily Sudanese human traffickers who had accepted payments in nakfa banknotes in exchange for transporting would-be migrants primarily to Europe. A consequence of this was substantial amounts of the country's currency existed in vast hoards outside of Eritrea. The plan to replace the country's currency was top secret and designed to prevent human traffickers bringing their funds back in time to exchange for the new banknotes. On 1 January 2016 the old nakfa banknotes ceased being recognized as legal tender, rendering external stockpiles of currency worthless. The current series of banknotes is the artwork of an Afro-American banknote designer, Clarence Holbert, and printed by German currency printer Giesecke & Devrient. Coins Nakfa coins are made entirely of nickel-clad steel. Each coin has a different reeded edge, instead of consistent reeding for all denominations. The 1 nakfa coin carries the denomination "100 cents". Coin denominations: 1 cent 5 cents 10 cents 25 cents 50 cents 1 nakfa (100 cents) Banknotes The nakfa banknotes were designed by Clarence Holbert of the United States Bureau of Engraving and Printing in 1994. Banknotes come in denominations of: 1 nakfa 5 nakfa 10 nakfa 20 nakfa 50 nakfa 100 nakfa There have been five series of banknotes since the currency's launch. The first issue for all denominations was dated 24.5.1997; the second issue consists of only the 50 and 100 nakfa notes and is dated 24.5.2004; the third issues also consists of only the 50 and 100 nakfa notes and was dated 24.5.2011, and the fourth issues consisted of only the 10 and