German 3,7 inch colour

[Stuka]

Hi there,

Does anyone know what would be the right colour for a German-made 3,7" projo with steel driving bands?
Would these be painted in the same yellow as 8.8cm Flak?
Any pictures? Guess surviving examples are scarce but it is worth a try.

 

[pzgr40]

As they ate German manufactured I assume they have the same colour as the 8,8cm Flak shells. Why deviate?