[veltro]

Obesrt, that is an extremely well known photo for at least 30 years. Unfortunately the copy you attached has too much contrast to see correctly details.

In Falcon's site (http://www.me109.info), looking under Bf 109 G-14, the Foto-ID: 729 is a much lighter version and there you can see that there is no Werke Nummer in white on mid-rudder, but instead it is (more commonly) present in black in lower position.

Concerning the apparently "half" Balkenkreuz, although faint, traces of the other lower "half" can be seen and this was not too much unusual, especially when mud, dirt and grime when taxi-ing were spattered all along lower fuselage.

Hope it helps.