1.  Seal of corporation.  The seal of the corporation may, but need not, be affixed to any document executed in accordance with section 104, and its absence therefrom shall not impair the validity of the document or of any action taken in pursuance thereof or in reliance thereon.  

2.  Corporate seal prima facie evidence.  The presence of the corporate seal on a document purporting to be executed by authority of a domestic or foreign corporation shall be prima facie evidence that the document was so executed.