The German IT website Winfuture has found a filing with ICAO (In German, use google translate) to rate the device as flight safe and ready. This is the only known reference to the “Model 1719”, also a correct numbering in the Microsoft ecosystems (Holo Lens is 1688, Surface Book 1796). The document also identifies an on-board battery, so maybe finally there will be a iPad keyboard with back light capabilities?