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Personally I think the 81/82 Greens is right over the 76 in this case..
So do I. There are two nice colour photos of W.Nr. 110604 taken at Lechfeld. This aircraft came from the same Schwabisch-Hall,Hessental Wald Werk batch as your subject (110596-110620) and is clearly 81/82/76. The RLM 76 applied to the undersides of these aircraft is a very light version,almost white in some images.
Cheers
Steve