[Big_Pilot]

My theory is that the triangle came from the aircraft navigation instruments.

Those are modern avionics, the planes at Luftwaffe didn't have the triangle back then. I think that our modern avionics got the idea of the triangle from b-uhr watches.

 

[Big_Pilot]

Appears to be a Bf-109 Emil.

Yeah|>
http://www.geocities.com/pentagon/2833/luftwaffe/fighter/me109/me109.html