Looking for an aircraft..
1) Shares its designation with another "Icon" of the Aviation Industry...
2) Experimental test aircraft for a new, at the time planform...
3) Planform the was tested / used by many countries and their various manuf. but has fallen out of favor
4) Experimental aircraft...a predecessor to another, rather famous aircraft...(which was built by the same manuf.)
5) Sources say 5 were built...but it was a test aircraft for another, which reached much higher production numbers...
6) There were single and two seat versions of this, what might be called "scale model" of a much larger aircraft...