“ All official military or naval books, pamphlets, documents, reports, maps, charts, plans, designs, models, drawings, photographs, contracts, or specifications, which are now marked under the authority or at the direction of the Secretary of War or the Secretary of the Navy as “secret”, “confidential”, or “restricted”, and all such articles or equipment which may hereafter be so marked with the approval or at the direction of the President. ”

“ Any person found guilty of a violation of this section shall upon conviction be punished by a fine of not more than $1,000 or by imprisonment for not more than one year, or by both such fine and imprisonment. ”