I had WNr. 740723 in my db as well, but I also had a FB entry for WNr. 440723 that should help confirm Matti's conclusion.
Bf 109G-6, 740723, ./., , III., 9., JG 26, weiße, 1 + |, , , 25-May-44, Bombenwurf., , FR, Beale,
http://www.ghostbombers.com/miscellany/raid/raid_1.html, , Fl.Pl. Nancy, b, F, , 07.39~,
Bf 109G-6, 440723, KEMETHMÜLLER, Ofhr. Heinz, 89, III., 9., JG 26, weiße, 1 + |, , , 10-Apr-44, Transit flight to Etain on this date.., RK., FR, FB H. Kemethmüller, , Fl.Pl. Vendeville, -, H, , ,