To be honest these markings on the plane say that machine is of the Geschwader Adjutant of the Stab ( Staff ) flight of a Jagdgeschwader (a Fighter Squadron). Of which squadron the plane was , we can find out either by finding a Werk Nummer of the plane ( it can be noticed on the fin of the Bf 109E under the swastica and a little bit in front of it) or from old documents, writing, pilots' , crews' memories etc.... But who was flown the plane we can get information from pilot's log books or an aircraft book. Also from unit members' memories etc...
Additionally if we know a squadron, a plane belonged to and a period of time a picture was taken, we can compare it to pilots' list who were servicing at that time in the unit and their emplacements .
The information that the BF 109E-4 was flown by Hptm. Wilhelm Meyerweissflog you can confirm by getting contact with Bundesarchiv in Germany. But all books I have gone through say it was his "Emil"
Additionally if we know a squadron, a plane belonged to and a period of time a picture was taken, we can compare it to pilots' list who were servicing at that time in the unit and their emplacements .
The information that the BF 109E-4 was flown by Hptm. Wilhelm Meyerweissflog you can confirm by getting contact with Bundesarchiv in Germany. But all books I have gone through say it was his "Emil"