the Netherlands Central Bank until 1 January 2007. Most guilder banknotes that were valid at the time of conversion can be exchanged until the deadline of 1 January 2032. There are some exceptions to this, and furthermore no banknote received as payment for commercial goods or services after 27 January 2002 is exchangeable. Refer Banknotes of the Dutch guilder for a full list of guilder Banknotes and their last valid exchange date. Coins In the 18th century, coins were issued by the various provinces. There were copper 1 duit, silver 1, 2, 6 and 10 stuivers, 1 and 3 guilders, and 1 silver ducat rijksdaalder and and 1 silver rider ducaton. Gold 1 and 2 ducat trade coins were also minted. Between 1795 and 1806, the Batavian Republic issued coins in similar denominations to the earlier provincial issues. The Kingdom of Holland minted silver 10 stuivers, 1 florin and 1 guilder (equivalent), 50 stuivers and guilder (also equivalent) and 1 rijksdaalder, along with gold 10 and 20 guilders. Before decimalization, the Kingdom of the Netherlands briefly issued some 1 rijksdaalder coins. The gold 1 and 2 ducat and silver ducat (rijksdaalder) are still minted today as bullion coins. In 1817, the first coins of the decimal currency were issued, the copper 1 cent and silver 3 guilders. The remaining denominations were introduced in 1818. These were copper cents, silver 5, 10 and 25 cents, and 1 guilder, and gold 10 guilders. In 1826, gold 5-guilder coins were introduced. In 1840, the silver content of the coinage was reduced (see above) and this was marked by the replacement of the 3 guilder coin by a guilder piece. The gold coinage was completely suspended in 1853, five years after the suspension of the gold standard. By 1874, production of silver coins greater in value than 10 cents had ceased, to be only fully resumed in the 1890s. Gold 10 guilder coins were struck again from 1875. In 1877, bronze cent coins were introduced. In 1907, silver 5-cent coins were replaced by round, cupro-nickel pieces. These were later replaced in 1913 by square shaped 5 cent pieces. In 1912, gold 5-guilder coins were reintroduced but the gold coinage was ended in 1933. The guilder saw discontinuation after 1930. Throughout the Wilhelmina period, a number of infrequent changes were made to the 10 and 25 cent coins as well, with the largest changes being