This is a model of the Messerschmitt P1110 jet fighter, a WW2 design that never left the drawing board. Note that the design was for a very small aircraft with a wingspan of just 6.65 metres (compare to 11.23m for the Spitfire MK V).
It is best printed in resin with its nose to the buildplate.
UPDATE: I have added a revised version with cockpit detail, improved undercarriage details and a separate canopy to be printed in clear resin. It also has a different wing and tailplane shape based on a different data source. I am not sure which sorce is more accurate. The 'new' version is at 1:72 scale. The photo compares both versions. I have included an STL with support for this version.
I still include the original model which is at a scale of approximately 1:86. For different scales print at a wingspan of:1:32 - 208mm1:35 - 190mm1:48 - 138.5mm1:72 - 93mm