1974 penny

Pictures difficult to get. If this is not a dd on the words AMERICA how do you know? I want to learn more about dd and machine doubling

 

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MD. Flat and shelf-like.

 

looks flat and shelf like which is MD, mechanical doubling

 

Ok, got it, thanks

 

Maybe this illustration could help.

 

It's called MD or mechanical doubling. It's a form of NAV or no added value doubling. It's very common. You can tell by it being flat and shelf like.

 

Good explanations on different types of doubling can be found on www.doubleddie.com John Wexler's site.

 

I don't have the eyes of experience, it's a challenge for me, I'll get there!!!

 

It takes time to learn about coins so just give it plenty of time.