I would like to draw everyone's attention to this photo
https://www.ebay.de/itm/155553925655....c101113.m2109
which depicts the elusive Messerschmitt M 26
When checking all available German civil registers D-2058 is listed as a blank.
It was built for an American Company (thanks Lennart Andersson) but that order was cancelled and the aircraft
remained in Germany.
As far as I know it has never been seen with its registration before.
Cheers
Stig