Norway's shift to copper-nickel for this denomination came in 1920, replacing the earlier silver issues — a direct consequence of wartime metal pressures and postwar monetary instability that forced Scandinavian mints to rethink subsidiary coinage entirely. Production of this type ran across a notably interrupted span, halting entirely during the German occupation from 1940 to 1945, when the Norwegian Mint ceased normal operations. Surviving examples dated 1941–1944 do not exist for this type; the gap in the sequence is the occupation.
Norway's shift to copper-nickel for this denomination came in 1920, replacing the earlier silver issues — a direct consequence of wartime metal pressures and postwar monetary instability that forced Scandinavian mints to rethink subsidiary coinage entirely. Production of this type ran across a notably interrupted span, halting entirely during the German occupation from 1940 to 1945, when the Norwegian Mint ceased normal operations. Surviving examples dated 1941–1944 do not exist for this type; the gap in the sequence is the occupation.