FOREWORD The subtitle to this new DATAFILE emphasizes the problems of identification that continue to confuse enthusiasts when French WWI Nieuport nomenclature is studied. In order to help modellers differentiate between the Nieuport 17 and its various relatives. J.M. Bruce has also provided illustrations and data for the 17 bis. 21 and 23 while lan Stair reflects the scope ot the contents by providing drawings for all these versions. The Nieuport 17 has always been a firm favorite with modellers and full-size replica builders the world over and this compilation of archive photographs, together with a sampling of the original 1917 German Rnzendaal drawings based on captured examples, makes a valuable contribution to our knowledge of this classic WWI French design.