On late memorial cents, perhaps 1996-97 on, one can quite easily find what is accepted "doubling" on the reverse. It usually takes the form of a little blip just to the left or right of Lincoln's statue or less commonly on the statue itself. Just as examples, open the link below and check out WDDRs 3-10 among others... http://doubleddie.com/747255.html Coins displaying this type of "doubling" are very common and to the point that I'd be very surprised if you searched more than a handful of solid date-range rolls without finding at least one. However, instead of using known examples and trying to find coins that match, you would be better off simply searching for this type of doubling simply because there are surely many, many that have yet to be attributed. My point in suggesting this is twofold. For starters it will allow you to finally and easily find an accepted "doubled die" (single squeeze coins being doubled dies is open to debate) in the wild, but it's also very good at helping to train your eye. Good luck either way. Oh, and @tommyc03 is quite familiar with these and may be able to add to the above.
FWIW - I don't bother looking at every coin. I only pull dates that have known significant doubling. I have looked at lots of examples of those dates and know exactly what I am looking for. To me, it's not worth the time to search every one for something so tiny and hard to see. I've probably missed plenty of lesser doubled coins but I feel my time is better used by doing more volume. Did I miss a discovery piece? Maybe...who knows...But the odds are so slim that again, I don't think it's worth my time to look for one.
I do have a few, but ONLY the "big" ones, none of the minor ones. I have that 1972 in MS65RD and the 1995 in MS67RD. My standard? Only the "major ones" in the Red Book and which TPGS firms recognize without extra charge, and ONLY in rip-roaring high condition. I read that the new 2019 Red Book that arrives this coming week or the next has more varieties than any previous Red Book. I "don't do no" website or Wexler stuff, but I do still have 6 unsearched solid BU rolls of 1969-S cents. I've searched two other rolls and about had a heart attack over a VERY broad machine doubling.
I know one one hundredths of 1% of what you guys know. I take the time to learn the coins to know what to be on the look out for and i can't do that with out looking at them as thoroughly as possible. Maybe one day i wont have to as i learn but i have to start somewhere don't you think? It's like learning the multiplications tables, you dont just learn 1, 2, 5, and 7
Everyone IS learning, but "back in the day", starting with errors and varieties, as a "gateway drug", was largely unheard of.
Now I see where you are coming from. I actually started by cataloging my World Coins from everywhere I visited, once I was done with that I got "hooked" and began USD coins since I already had so many. Unfortunately you had to assume all I look for is "errors and varieties" because I ask about them but I actually ask about them to catalogue them correctly. I don't want to write "MD" when it is a "DD" and vice-versa. No worries though, I will just continue to add and ask fewer questions here.
Quite true, but we also didn't have near countless insufferable schmoes promoting such things as a sure bet vehicle to easy riches. Something tells me that if we removed the clowns from the equation, leaving only the Wexlers and Wiles, varieties in particular would still be little but the niche they rightly deserve. @Surgeprotector - don't worry about asking a bunch of questions. You're obviously sincere, do not expect/demand others do your homework for you, and are not only out for the easy millions, so please, ask away...
@BooksB4Coins You explained above quite nicely my friend. What I can add, is that most of the minor doubled dies we are referring to occurred mostly from 1998-2006 on the insides of the columns, left and right of the statue with a few at the legs. There were others before that but are not as commonly found. The 1997 with doubling in the last bays is a very elusive coin and considered to be a more significant DD. And it's a very easy one to spot. I do not actually collect these per say, but gather them up and save only the best to sell on Ebay in lots of 20 coins, and very reasonably. No hype in my descriptions but just that they can be fun. Especially as James Porter has done with assembling a complete set of the 2009P Formative Years cent, one might just focus on 2005 which seems to have been the most prolific year for these minors. Researching these is a good lesson in patience. It would make for an interesting coin club project. There are plenty of these still in circulation in nice condition and that is where I have found most of mine. But as Chris has mentioned many times, they will never be worth a lot. But they will be a lot of work.
Thanks, Tommy! Although not a roll searcher, I did go out and pick a few up when I first learned of these. If memory serves me, I believe I found one or two both before and after the 1998-2006 range, but will certainly defer to your experience regarding the range in which they were most common. I also just happened to find a couple 2006 DDOs in pocket change (ones with the obviously smeared date and Liberty), so such coins are out there. If someone who very rarely bothers to look at his change can find them, so should anyone making the effort to do so. Anyway, I hope the OP takes this to heart. Even if not the type they're hoping to find, it really is good exercise. Thanks again!
Likewise, as always. I get the impression some folks don't like being tagged even when they could add much to the discussion, but you've always been game and I very much appreciate it.
I do and I appreciate all the info on the subject. But one thing I feel I need to make clear, I am not just looking for DD's like Kurt inferred via youtube. I am also not looking to sell anything (well unless I miraculously find a Million Dollar coin). I'm just hoping to find something cool to me and I thought, erroneously, it was a DD I found since everyone seems to have at least one. But I do find it weird that there are so many out there (Including minor ones) and i have yet to see one so all the info on here has really helped me in better identifying one. As a side note/question, I know through research that some cents have been struck on planchets of different metals and i have a 1976 that looks bronze (not saying it is). How would I look to find if it was a planchet error or a plating issue?