[Stig Jarlevik]

Thanks Peter

Admit I still cannot see D-IXAH the way you do, but certainly plausible.

In your first photo from e-bay showing a line up of three HD 38 and what I think is a number of He 51s, D-IXAH is clearly visible as number two in that line.

The third one could well be D-INYH, an Arado built aircraft.

Cheers
Stig