1000's of pennies - Searching 2000's

I just searched all my 2000 pennies.

i did not find and WAM's unfortunately.
Most (nearly 90+%) were 2000d pennies - which I do not believe had WAM.
From what I understand they were mostly 2000p (no mint mark) or maybe some really rare 2000s.

I did however find some "wooden looking" pennies I thought I'd share. I'm not sure what causes this or if they are collectible though - here are some samples:

 

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What you are seeing are fine Linear Plating Blisters.

 

Ah - you're right..
some good examples here: http://www.error-ref.com/blisteredplating/

 

Very nice blisters.

 

agreed!

 

Are these worth keeping - or just spend them?

 

AH - DARN! - I just realized to threw them into the "take back to the bank" can... let me know if I should dig them out??

 

Blisters are common and bring little to no premium but if you are s collector of sorts those were really nice and worth keeping.