Small documents estate with 2 patent certificates, as well naval cadet dated 7. April 1891 and under Lieutenant at sea dated 22. May 1893, both with calligraphed header and large stamp seal, in addition to it 2 certifications, as well certificate the matureness to the midshipmen dated 28. July 1892 and certificate the matureness to the naval officer dated 22. Oct 1894, both certifications with signatur admiral of the Goltz Imperial upper command the navy, in addition to it two more write and 3 photos, mixed condition. Heinrich Friedrich Christian Ludwig Retzmann ( born 27. April 1872 in Hanover