if i post to much just let me know i have a number of coins im not sure of and i gain a lot of help and knowledge from every one who response ths to all this penny looks like the one in cherry pickers what do you think
I would say that it is a large "S". As to an RPM you will have to check Variety Vista as there are 4 RPM's for this one. http://www.varietyvista.com/02a LC RPMs Vol 1/RPMs 1928S.htm
I checked Wexler's and Variety Vista and I didn't see one that matches . I'm not sure it's even a RPM . IMO
There's no limit on how many threads you can create. Ask away all you want. As long as it is 1 coin per thread
This is a handy link to save. The MM styles used by year http://varietyvista.com/01a LC Doubled Dies Vol 1/San Francisco Mintmark Styles.htm
To me it looks normal in the sense it has seen wear. Nice find but I wouldn’t be excited about the S.
Post any time, one at a time, We are here to help, enjoy, and learn just like you. By the way I agree with paddyman and others on their assessment, good luck.