Dark Centered, both sides, 1972 half dollar

[corbinneville1]

Can someone explain to me why this half dollar has this darker center on both sides??

 

[corbinneville1]

Can someone explain to me why this half dollar has this darker center on both sides??

The other side

 

[river roamer]

Did you find it in the ground?

 

[l.cutler]

Just something it was exposed to sometime in the last fifty years. An endless number of things can cause various toning to coins.

 

[E-Trac-Ohio]

That's odd !

 

[corbinneville1]

Just something it was exposed to sometime in the last fifty years. An endless number of things can cause various toning to coins.

Thank you everyone for the replies. I FINALLY found 9 clad 1967-1968 half dollars in one roll today!! So excited I went to a coin shop to celebrate and purchased a 1917 half dollar and 1914 quarter!