The area strongly suggests that it was a plane from Luftflotte 4
.
LF4 included two units with Bf109: JG52 and NAGr.14.
11..05.1944:
I./JG52 did claim several planes in the area of Grigoriopol, while 1./NAGr.14 claimed two Doppeldecker in the area east of Rybnitsa (also on the Dnestr, but further North).
15.05.
Again several claims by I./JG52 in the area.
For the well-documented JG52 I didn't find anything about a Leutnant Stahl. So, for me it seems to have been a pilot from NAGr.14. Its Stab and 1.Staffel were based in Leipzig (Bessarabia) and Comrat at that time, so I guess they covered the right part of Heeresgruppe Südukraine while 2.Staffel covered the left. Also, 1.Staffel had a loss due to enemy action in May '44.
The Aufklärer flew in Rotten, so it all makes sense as long as no Lt. Stahl from JG52 "pops up".
Sources:
-
http://www.ww2.dk/air/recon/nagr14.htm
- Tony Wood's claim list
- Luftwaffe maps covering the area
What backgound information can you give us on that case?