Currently on eBay (including
here and
here) there is a selection of pre-war He59 photos. The aircraft are coded 60+_53. Several sources logically have this code as 3./Küfl.Gr. 506. However the eBay seller has this collection as belonging to 3./Küfl.Gr. 106 at Borkum.
While I accept that numerically we should assume that it is 506, I note that this not the first time that aircraft with this code have been stated as belonging to 3./Küfl.Gr. 106 (J-P Foto Archiv Band 9 p. 82). It maybe of note that modern sources also have the same emblem for these two units. He60 listed as being of 1./506 have the code 60+_31 which also fails to correspond to logical code patterns.
So is this a case of modern authorities using modern logic to attribute codes? Are there any original documents which can help here?
Ian