These two plans show the Blohm und Bos Bv 140 three seat floatplane, of which only three prototypes were built.
This image is taken from US FM 30-35 Indentification of German Aircraft of 11 March 1942.
How to cite this article:
Rickard, J (16 June 2018), Blohm und Voss BV 140 Plans , http://www.historyofwar.org/Pictures/pictures_blohm_voss_BV_140_plans.html