Fabrizio,
Maybe you need a backhoe to dig it!!!
I'm kidding ...
More seriously we have nothing to find something serious.
- Place is roughly enough but no date.
- No plate yet?
However if we start with units in the vicinity (1944; since "they" were far from here in 1945: Chartres and Rambouillet):
Stab JG 26 is a possible candidate ...
As well are JG 105 and III./JG 3.
I have four losses in Chartres area:
9./JG 26 and 10./JG 26, though not Stab JG 26 but why not, all four between 17/07 and 9/08/1944, all Bf 109G-6s. I don't have Bruch % ...
But location isn't NE of Chartres, though means nothing if errors in reports.
I've not enough losses to complete this research. Others are more able than I am ... Good luck.
Franck.