You need to show photos of column 7. There's no way we can tell if it is 1dr-016 with a photo of the last column.
Send it in, then? I'd love to have a new listing on coppercoins to look out for. Especially one as strong as this (if, in fact, it turns out to be a DDR)
I'll tell you what. There is a small attribution fee for coppercoins.com. If you send it in and it does turn out to be a new die, I will pay the attribution fee for you. If it turns out it is NOT a doubled die, then you have to pay for it yourself.
on these darn zincoln coins the copper plating problems is really confusing. sometimes it still even tricks me a little and I have collected error coins for close to 50 years. when the zinc starts to rot and swell outwards it can cause all kinds of things to look different.