History of the Nebraska State Flag:
Nebraska’s official state flag with the seal on a blue background was first displayed January 1, 1926. Nebraska officially described the state banner in 1925. In a bill introduced by J. Lloyd McMaster, passed by the legislature and signed by the Governor on March 28, 1925, the design of the banner was described as "…a reproduction of the Great Seal of the State charged on the center of gold and silver on a field of national blue.” In 1963, the Nebraska State Legislature designated the state banner the official State Flag of Nebraska.
Some confusion exists over the use of the unofficial state banners prior to 1925. On April 2, 1925, Governor Adam McMullen approved the bill and Nebraska was provided with a state banner, described officially: "There is hereby designated a banner for the State of Nebraska which shall consist of a reproduction of the great seal of the state, charged on the center in gold and silver on a field of national blue." The 1925 law resulted from the efforts of many organizations and individuals.
The seal was provided for by Nebraska's first constitution, adopted in 1866. Embodied in the seal is a steamboat that ascends the Missouri River. The seal bears mechanic arts symbolized by a smith with hammer and anvil. Nebraska’s agriculture is illustrated by a settler's cabin, sheaves of wheat, and stalks of growing corn while a train of railroad cars head toward the magnificent Rocky Mountains. At the top of the circle proclaims Nebraska's motto: "Equality Before the Law."