OK, I think Tomislav has established beyond reasonable doubt that 3U+JH came down a considerable distance from where the remains of the Bf 110 which is the subject of this thread were found. Not the same aircraft.
Regarding the numerals '1' and '7', here's one example of what I am talking about. Handwritten correspondence from Balthasar Aretz, pilot of 2./Erpr. Gr. 210; III./ZG 26, and other units. Note how he writes the number '7'. This is just one of many examples I have in my research records.
