Missing AW on 1941 Walker

Was the missing engraver's initial's only on the 1941 Walking Liberty Half or were there other years?

 

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Although I don't exactly believe this is a real variety. (yes feel free to respond passionately if you disagree). Yes, there were other years:

1918 D
1929 S
1943 S
1941
1944
1945

Perhaps i'm just cynical haven't not truly felt like i've found one myself...

~JobIII

 

I believe there has to be no trace, don't forget the die state. I have only found one 69 Lincoln.