[RolandF]

There seems to be some confusion. I have:
WNr 10253, Me 410, SN+HB, F6 +QK, 2.(F)/122, Ff Ofw Arthur Kammberger POW, Bf Uffz Vitus Mirlbach POW, 11 Nov 1943 emergency landing after being shot down by fighters during recce area Foggia-Bari-Termoli in riverbed of river Sangro.
WNr 10259, Me 410A-3, SN+HH, F6+OK, 2.(F)/122, Ff Fw Hans Beyer POW, Bf Uffz Helmut Hein POW, 27 Nov 1943 emergency landing after becoming disorientated and due to fuel exhaustion during recce area Naples, Montecorvino a/f
F6+QK has been photographed lying on its belly in the pebbles of river Sangro. StKz SN+HB might not have been overpainted on the wings lower surfaces and difficult to read. A rather angular stencil for letter "S" and you get the above-mentioned "code" 5N+HR additional to F6+QK.
SN+HR was heavily damaged 30 Dec 1943 at Epinoy a/f.

Regards
RolandF