I think I'd have it looked at.
You can try the
VAM forum on this site first. Copy and RENAME your photo before posting it there. If you don't copy and rename the photo, it will disappear from this thread and make us crazy.
The folks on the
VAM sites have studied more Morgans than I've probably every seen. They might be able to help.
If not -- then try CONECA. Look them up. They are error specialists and charge a very low fee for attribution.
Regarding the rest of the coins that you think might have errors, use the Error forum and it's best to start a new thread for each coin.
That 1900 is pretty cool and I wish you good luck in finding out more about it.