A book issued with all naval Enigma machines to document repairs and modifications. This example has only one entry, dated the 7th of May 1945, a day before the German surrender to the Allied forces. M.N.O. is an abbreviation for 'Marine Nachrichten Offizier' (Naval Intelligence Officer). Molde is a port in the north of Norway. The serial number on this Begleitbuch indicates that it was issued to machine M10289. This puts it within the relatively rare range of machines with the manufacturer code 'gvx', which was used by Konski & Krüger's factory at Geyer, Saxony. According to Frode Weierud, 300 machines, probably between M10001 and M10300, were produced at Geyer. Fifteen of these machines, with serial numbers from M10119/gvx/44 to M10300/gvx/44, are known to have been used in Norway during the war. On the inner cover of the Begleitbuch is the warning: "Dies ist ein geheimer gegenstand. Missbrauch ist strafbar." (This is a secret item. Misuse is a punishable offense).