The thirty-eighth of forty-eight Bowery Boys movies released from 1946 to 1958.
The split coin that's used to identify the secret messenger is a cap-and-rays style Mexican silver peso, last issued in 1909.
Vienna born Leon Askin, a busy character actor, appears here as the King's aide. He played many roles over a long career but would become most well known a decade later as General Albert Burkhalter on the TV comedy Hogan's Heroes (1965).