I am new to this hobby and have some questions. I have watched several videos on you tube and need to understand the terminology better. As I've only been doing this about 3 weeks. First I would like to know what BU stands for? Second I would like to know the difference double die and a machine doubling? Third how do you post a picture on here so I can get some information on a coin I fave found? I know these questions sound dumb to an experienced coin person, but I am new and I've always been told to ask questions. So please take it easy on me. I'm sure I'll have more questions as time goes on. Thanks for any information you can provide
First and most importantly: stay away from YouTube! Question 1: "BU" is "Brilliant Uncirculated" As for question 2... http://doubleddie.com/58222.html http://doubleddie.com/144801.html And question 3: simply use the "upload a file" button next to "post reply". Welcome to the forum!
Welcome to Coin Talk. And I will third the motion about You Tube. Please stay away from it as there are just way too many amateurs looking for hits, likes and self promotion. Visit the links Books provided above but do take some time to go through all that is there on that site. There is a wealth of information on that one site alone to answer many of your questions. Plenty of photos of true doubled dies and other coins that mimic doubling but are not. There are explanations for all sorts of doubling, including but not limited to, hub doubling, strike doubling, die deterioration doubling with photos to show you the difference. Especially important is the article on the 1972 doubled die coins, of which all of us would truly like to find the "Big One".
This could keep you busy awhile. https://www.usacoinbook.com/encyclopedia/ http://www.error-ref.com/ http://www.coinflation.com/unitedstates/
Welcome to CoinTalk. Don't quit looking at YouTube, but take what you see there with a bit of caution. Much of what you might see is hype. Regarding machine doubling, I always think of punching out a cookie with a cookie punch and moving it slightly as you pull it up...you would leave a flatish shelf-like edge to the cookie.
Youtube can be a very good resource, but it depends on how you are using it and what you intend to learn from it. Amateur videos showing "how to" videos, like how to clean coins properly and the like should be avoided. However, some videos are useful, such as those produced by the Mint. The best places to learn from are articles published by accredited publications, like Coin World, PCGS, NGC, ANACS, Numismatic News, error-ref, and articles people post here on cointalk.