Kaiserliche Werften (Imperial shipyards) - Extensive documentation of the Imperial, later Reichs- and Kriegsmarine shipyards. Focus on Wilhelmshaven and the Jade. Original documents relating to the yard, early photos, instructions, reports, newspapers, later copies and explanations. It documents for the employment of shipyard personnel, ice reports 1922 and 39/40, war harbor documents, sold books, Lehrbrief, Heuer books, report winter 1922, building reports, order u.a. Certificates and contracts of members of the shipyard. Also including three letters 1885-1891 to the operating health insurance of the imperial shipyard in Wilhelmshaven, each with the hand signatures of the admirals Caprivi, of the Goltz, Koesters. Transcriptions enclosed. Impressive documentation, which should be unique in this abundance.