Hi is this struck on a silver planchet? weight is 2.89 and you notice the back is completely missing stuff on top
Not really. Only if you understand them better. Not everything that looks strange or different is an automatic Mint Error. Most stuff you see is damage, circulation wear and tear.. Etc. Study first before assuming everything is an error - http://www.error-ref.com
appreciate it, i actually go thru about 10,000 coins and will maybe assume one is an error i do alot of due diligence but thanks for tip
here's something to add to your checklist. If it looks like a darker color copper, then it probably isn't silver. You probably got all excited thinking it was an error. Ppl usually over look things when that happens.
I pulled everything and anything that looked 'off', different or somewhat different than the rest. Many years later I still maintain one large pile of coins (albeit it separate and ready to examine) that are 'off', different or somewhat different. I grab a pile every once and awhile, go through them, put some in flips and label them a definite maybe and return the remaining back into the pile. I've gotten as far as separating by year, denomination and that they are likely American. The education continues.
here's how the make/mint silver Commemorative type coins (Canadian) ==> and regular coins - US Quarters ==> notice how consistent it is, and the outcome. Now think of how errors can happen in this process. then you'll have to figure out what errors can occur *IN* this process. NOT *AFTER* this process as that is all damaged after minting. then you can refer to the many error websites out there if you are interested in Cents, Nickels, etc. ==> https://en.wikipedia.org/wiki/Mint-made_errors as you'll find out, Mint Errors are LIMITED as it has to occur in the process, and Damage is UNLIMITED