meaning of graphics on lens

gg7500

New member
Concerning Nikon AF 2.8 28mm D. The version I have has a graphic mark above the 'made in japan', its two arrows circling the number 10. I have seen the same version of the lens without this mark above 'made in japan'.
Would like to know the significance of this mark. I know little about the Nikkor lineup so reaching out here for answers. Thanks

Screen Shot 2019-03-27 at 1.23.08 PM.jpg
 

gg7500

New member
So is this a more recent version of the original 28mm D? Guessing it would be 'cause of the recycling revolution.
Thanks
 
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