@MajorPatW
If I may add to what southsav put so well, is I believe if you should go visit some websites that are ran by well know coin experts and examiners. They have what I call the master lists of know or "Listed Errors & Varieties" they assigned a notation in their own flavor if you will, such as FS-01-1955-501 or 1MM-001 or WRPM-001 lol or CONECA-1. Whew! all of those are assigned to a single year and coin, all would start or end with the 1955S designation of the coins year. So it can be a little overwhelming,and with that lets go to
http://www.varietyvista.com/index.htm
https://www.coppercoins.com/lincoln/
https://doubleddie.com/1801.html
https://conecaonline.org/
Well I`m sure others can suggest more places but my point here is to say to just browse these sights, pick a coin denomination or look up your own on multiple sites to get an idea how the different notations work for the same coin or are unique to others. Hope this helps at least a little .
If I may add to what southsav put so well, is I believe if you should go visit some websites that are ran by well know coin experts and examiners. They have what I call the master lists of know or "Listed Errors & Varieties" they assigned a notation in their own flavor if you will, such as FS-01-1955-501 or 1MM-001 or WRPM-001 lol or CONECA-1. Whew! all of those are assigned to a single year and coin, all would start or end with the 1955S designation of the coins year. So it can be a little overwhelming,and with that lets go to
http://www.varietyvista.com/index.htm
https://www.coppercoins.com/lincoln/
https://doubleddie.com/1801.html
https://conecaonline.org/
Well I`m sure others can suggest more places but my point here is to say to just browse these sights, pick a coin denomination or look up your own on multiple sites to get an idea how the different notations work for the same coin or are unique to others. Hope this helps at least a little .

















