The first known appearance of Flach (as in Flachflieger) is from an Egyptian painting on a wall in the tomb of Flachenaton the First, also known as the Flying King. Here we see the clear symbol of Flach as the men bearing gifts and women worshiping the mythical sign.
Flach the First was pictured in many places as a winged man or as in this particular picture as a crowned bird. Later interpreted as a Griffin.
The sign of the flying man moving over the flat desert has always seemed to resonate with later incarnations of the Flach heritage.
Above we see a picture of the entire piece. Further below a magnification of the actual Flach.
(...more to come)