According to Lehrbuch der Fotografie (David 1911): it is a symmetrical anastigmat with six or eight elements in two groups (Herr David is not consistent in his information – he describes the lens as having six elements but the drawing of the lens construction shows eight elements). Your length is not listed but the 30 cm version covers 24x30 cm wide open…

You can also use the lens as a convertible, and it is supposedly well corrected for this.