The Nepalese rupee (रुपैयाँ; symbol: रु॰; code: NPR) is the official currency of the Federal Democratic Republic of Nepal. The Nepalese rupee is subdivided into 100 paisa. The issuance of the currency is controlled by the Nepal Rastra Bank, the central bank of Nepal. The Nepalese rupee was introduced in 1932 when it replaced the Nepalese mohar at the rate 2:1. The Nepalese rupee (रु) has been pegged to the Indian rupee (₹) at the rate रु1.60 = ₹1 since 1994; prior to this, it had been pegged at the rate रु1.45 = ₹1. The rupee was introduced in 1932, replacing the silver mohar at a rate of 2 mohar = 1 rupee. At first, the rupee was called the Mohru in Nepali. In 1955, 4 Paisa coins were minted, made from rifle cartridge cases from World War II that were used by the Gurkha soldiers who fought against the Imperial Japanese in the Pacific. The coins were produced by removing the primer from the cases and the cases were then converted into the 4 Paisa coins to commemorate their courage and victory during the war. Due to the small number of cases found, these coins were minted for one year only. They are known as the "Nepal Bullet Paisa". During King Birendra’s rule, one can also distinguish between two major series of banknotes. The first series features the king wearing the military uniform while on the notes of the second series the king is wearing the traditional Nepalese crown adorned with feathers of the bird of paradise. During this period regular banknotes of 2 and 20 rupees and special banknotes of 25 and 250 rupees were issued for the first time. The legends found on the last issues of Gyanendra revert to Nepal sarkar ("Nepalese government"), thus omitting the reference to the king. In October 2007, a 500-rupee note was issued on which the king's portrait was replaced by Mount Everest. This reflects the historic change from a kingdom to a republic which took place in May 2008 in Nepal. Further notes of 5, 10, 20, 50, 100 and 1000 rupees with Mount Everest and without reference to the king in their legends followed in 2008.