In the late 19th &/or early 20th century there was an organization
known as the N.W.L.A.--possibly a labor-related or insurance-benefit
society for Norwegian-Americans-- which had as its emblem a square
formed by four clasped hands, representing the states of Iowa,
Minnesota, North Dakota, and South Dakota.  Within the square was the
word "Union."  Please identify.

You could try contacting the Norwegian Emigrant Museum, their website
is at http://www.museumsnett.no/emigrantmuseum/