When new banknotes and coins whose denominations were identical but designs and sizes differed, were issued, their classification titles used to be '原‘, ’新‘, ’改‘, ’改甲‘ (in the order of issuance). However, since May 1, 1993, the classification titles of banknotes issued since the Third Currency Reform in 1962 have become 'Ga' (first), 'Na' (second), 'Da' (third), 'Ra' (fourth).
From 1982 until 2005
The shapes of current notes and coins in circulation were completed and became more sophisticated in the 1980s. A unified lettering and numbering style was introduced and a variety of features including braille recognition for the blind and anti-counterfeiting features were added.
The shapes of current notes and coins were completed and became more sophisticated in the 1980s. 500-won notes began to be replaced by 500-won coins from June 12, 1982. And on January 15, 1983, the Bank issued new 100-, 50-, 10-, 5-, and 1-won coins. Their letters and numbers were unified with the letters '한국은행‘ being placed along the bottom on the reverse and the manufacturing year at the top of the reverse. Then, the Bank issued Na (second) 1,000-won notes and Da (third) 5,000-won notes on June 11, 1983 and Da (third) 10,000-won notes on October 8, 1983. The Da (third) 5,000- and Da (third) 10,000-won notes issued at that time were little different from Ra (fourth) 5,000-won notes, Ra (fourth) and Ma (fifth) 10,000-won notes in terms of size, material and design. The Bank later issued Ra (fourth) 10,000-won notes on January 20, 1994, Ma (fifth) 10,000-won notes on June 19, 2000 and Ra (fourth) 5,000-won notes on June 12, 2002, repeatedly reinforcing their securities features, thus incorporating a windowed security thread, moire pattern, micro lettering, intaglio latent image, color shifting ink, and special press and soldering.