During World War II, bronze and aluminium-bronze coins were replaced by zinc and aluminium, with the 2 Reichspfennig discontinued for potential of being too easily mistaken for the 10 Reichspfennig when being struck in the same metal. The 1, 2, and 5 Reichsmark coins were no longer issued, replaced instead by banknotes. Aluminium 50 Reichspfennig coins were reintroduced to replace the nickel versions. This time around they had a longer run, being produced from 1939 to 1944. Lower denominations were produced in zinc from 1940 onwards. Due to their composition, these coins had poor durability and are hard to find in very good condition. The last production of coins bearing the swastika was in 1944 (1, 5, 10, and 50 Reichspfennig) and 1945 (1 and 10 Reichspfennig only).