Should I keep these or pass them by?

[Snee]

I've done lots of searching through penny rolls and I'm constantly coming across ones from 1968-1974 with an S mint mark. Is there any purpose in keeping these? I've been passing them by...

 

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[jeff of pa]

The ONLY Reason Would Be 1981 & Earlier Are Copper, & some
1982's. are also.

That goes for All Mints, P (no Mint mark) , D, & S

 

[Immy]

I don't, but check each 1969S carefully. Some have the word Liberty doubled.

 

[Snee]

Alright, I was just wondering because the S mints of those years have a much lower mint number produced. Thanks for the help.