Mint Error? 2 2

[Walter Holmes]

I have a 1941 Walking Liberty Half Dollar the obverse is tapered not worn. Rim missing between the B and R in Liberty. What type of error would make this anomaly? See picture. 
 

[Walter Holmes]

Another pic

[Walter Holmes]

Another picture. 

[bsshog40]

Looks like it might be slightly off-struck to me. 

[Coinbuf]

I cannot think of a way this would happen during the coining process and do not think this is a mint error, looks like the rim was worn down intentionally for some reason or another.   Impossible to know why, perhaps some fellow many years ago needed a screwdriver and this became the stand-in.

[Walter Holmes]

So save my money and not have this coin graded to include a minting error?

[RWB]

Might be a slightly tapered end-of-strip planchet, but not worth the cost of authentication. Still, and interesting conversation coin.

[Henri Charriere]

[Well, there goes my rarely observed, exceedingly rare, beveled edge Walker theory right out the window.]