9NU 1922 St. Louis, MO.

The operator was Henry ClayThompson, W9NU, ex 9NU.
He was an active operator from the early 1920's until about 1930.
In his life was involved in several things: electrical engineering, amateur radio and the history of Missouri.
He was the author "Sam Hildebrand Rides Again" in 1950.
He was born May 20,1889 in Milwaukee, Wisconsin and died June 17,1974 in Missouri.

QSL from the estate of 5KC
QSL + Info courtesy of W5KNE