Thanks, gentlemen!
I looked at the Flugzeugbestand of III./JG 1 and found out that in May 26 Me-109 G-6 aircraft were delivered. I found out that for example WrkNr 15458 (black 10 from Lt. Joachim Göhre) belonged to this lot. After some research, it turned out that this aircraft was delivered by Erla on 14 May 1943. In this Erla-lot most probably also were some of the following other Werknummern: 15363, 15365, 15366, 15367, 15389, 15429, 15438, 15439, 15440, 15441, etc. I found 26 + one uncertain Messerschmitt. By the end of May, or maybe even in early June, WNF must have delivered a second lot. This lot includes Werknummern like 19611, 19613, 19848, 19854, 19913, but even 20103 and 20114 from a different block. These are just my observations, but if someone could add anything: let me know!
Interesting to note is the fact that 15472 made an emergency landing on 19 August 1943 after a collision. This day Oblt. Herwig Zuzic collided with another plane from his staffel; most likely this mystery is now solved: 15472 collided with Zuzic's 15367.