2009 proof set question

The container of cents from my 2009 proof set have an interesting look to them. I can only describe it as sunburst perhaps. the center of the cents are shiny red, and as you move to the rim, the tone changes to a metallic look. Any opinions would be awesome!

 

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toning?

 

I believe those are 95% copper, that might have sped up the toning process.

 

The packaging might have helped too, kind of like the old Raymond albums.

 

I think it would be pretty common then though. would have to compare other 2009 sets

 

I have several sets of these and they all did the same thing

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Yep, toning.

 

Mine toned in the same way. Has a nice rustic look to it.

 

Yep, toning. The mint even held up sales for awhile, stating there was a toning "problem". Not a problem for me, I like nice toning on cents. Yet, the TPG'ers grade them as Red/Brown, which sells for less than Red. I don't know, will collectors ever consider the R/B's as nicely toned and pay a premium, like they do now for silver coins?