User1975, a DDO is a doubled working die, there are much less of these than a doubled working hub, which is what a WWHO is, in doubleddie.com terminology. Doubled working hubs are extremely high in numbers, as far as what was minted with them, in turn it makes them very common. Here is a link to read up on how coins are made and the things I just explained to you. Before you go any further, you should do a little studying. The link is from the same site you referenced earlier. Take your time reading and post any questions you may have as you go through it, one of us will help you.
LINK https://doubleddie.com/58222.html
LINK https://doubleddie.com/58222.html
-makecents-






















