1957 d lincoln cent strong doubled date. DDO? advice greatly appreciated

i don't see any shelf like edges. could this be a doubled die?

 

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forgot to add a blown up pic

 

Looks like classic mechanical doubling to me.

 

had to take a shot. when i usually see it on newer coins the "stairs" are overly apparent. ty just the same

 

Sorry but as Matt said it is strike doubling (aka mechanical doubling). Note the flat shelf on the numerals.

 

Flat and shelf-like...cuts into the devices...classic MD. Here is a small tutorial I wrote on how to tell different kinds of doubling from true hub doubling. http://www.cointalk.com/t224087/
Keep up the hunt!