Is this a mint error or could it be just worn off? I cant see how it could be worn of without wearing off the edge. 0

[Ted Brewster]

[Just Bob]

Welcome to the forum.

Your coin looks like what is usually referred to as a "grease filled die." Something filled the last two numerals of the date, preventing the metal from flowing into the recesses. Although cool to see, they are actually fairly common.

Edited August 30, 2020 by Just Bob
left off a letter

[Ted Brewster]

Thank you. I just could not find this error for 1919 any where on the internet. 

[Coinbuf]

If you look closely you can see the numbers, the one is slightly better defined than the nine but both are visible.  As mentioned this is a striking anomaly caused by something that limits the flow of metal into that area of the die, usually attributed to grease. 

[jgrinz]

Not really a sought after OR desired coin anomaly

This type of mint error is pretty common

 

 

[James_OldeTowne]

There is no added value here, and for that matter, the weaker date might be a negative for a common coin that can always be found "nice" (in circulated grades).

[RWB]

PS: The part of the coin you are calling the "edge" is really the raised rim that helps protect the design from wear. "Edge" is the narrow flat part between obverse and reverse.