Section 237. Penalties

Any  person  or  persons,  firm,  partnership,
  corporation or association or any officer, director, employee  or  agent
  thereof  who makes, or sells, or offers to sell or dispose of, or has in
  his or its possession, with intent to sell or dispose of, any article as
  herein defined to which is applied  any  quality  mark  which  does  not
  conform  to all the provisions of this article, or from which is omitted
  any mark required by the provisions of this article, shall be guilty  of
  a misdemeanor and upon conviction thereof shall be punished by a fine of
  not  more than one thousand dollars or by imprisonment for not more than
  six months, or by both such fine and imprisonment in the  discretion  of
  the  court  provided  however,  that  it  shall  be  a  defense  to  any
  prosecution under this article for the defendant to prove that the  said
  article  was  manufactured  and  marked  with  the  intention of and for
  purposes of exportation from the United States and that the said article
  was either actually exported from the United States to a foreign country
  within six months after date of manufacture thereof with the  bona  fide
  intention   of  being  sold  in  the  said  country  and  of  not  being
  re-imported, or that it was delivered within six months  after  date  of
  manufacture  thereof  to  a  person, firm or corporation whose exclusive
  customary business is the exportation of such articles from  the  United
  States.