Small certificate group with patent and appointment certificate and a Doktordiplom, patent document as Lieutenant at sea dated "large head quarters the 16. March 1918", with large Reichs seal, punched and rolled, appointment document as Bergrat dated Berlin the 25. September 1934, with large Reichs seal, punched and rolled and Doktordiplom for the became of a doctor engineer dated Clausthal the 23. May 1925, with seal the college of mining Clausthal, slight mould stain and rolled.