Double edged Pennys???? MINT ERROR HELP!

[BrianDickSmith]

Double edged Penny's? MINT ERROR HELP!

Hey everyone.
Im posting this here because I never seem to get a response in the coin section. I have 4 pennys here and I was wondering if the image being slightly off center meant anything here. I own a mint error penny so I know what they look like but my question is about the edges of the penny's. 2 of them below seem to have a doubled edge. Im sure there is no significant value here but im still curious as to why this happens. Thanks!!

 

[smokeythecat]

They are slightly off center. I have seen Ebay ads referring to them as "railroad" errors. I don't keep them. Check out Ebay for penny errors and see if you can gather any more info.

 

[RobRieman]

Yeah those babies are $.12 a dozen. Seems like they don't care what a penny looks like when they are stamped. I went to a flea market and they were selling pennies stamped half way off the blanks for 10 bucks. They weren't even completely round. Pretty cool looking though!