A couple of years ago I was priviliged to view the Art of the Orange gallery at Los Angeles Public Library and got to view pristine examples of label art, with accompanying explanations of how the grade of the fruit was embedded in the imagery on the labels (like the King David above which meant grade "A" fruit)
I found (accidentally again looking for proposal imagery) this wonderful collection of images from Cratelabelsonline which has good sized images, and a large collection of the classic California and West Coast agricultural marketing images.
Check it out - you won't regret it.
