A very tough call. But, perhaps it is because it looks like there is a small hit on the top of the MM. That could be throwing me off.
Sorry I can't really tell. When Speedy posted his the other day I just took a lucky guess at inverted MM. I've sense been lookin at Cherry Pickers Guide and my 41S's and they all look the same to me! I just can't figure out this inverted MM Good Luck! You can try posting it over on the CONECA Forum and see what James Wiles has to say about yours.
Well I figured out how to check my 41S's. I look at the Cherrypickers photo the I have to look at my nickel holding the reverse udside down. They all look like the picture in the Cherrypicker that way meaning mine are not inverted. Man! I have dyslexia and it was blowing my mind trying to look for a inverted mintmark without it getting inverted in my mind!!!! LOL. Still not sureabout yours Tommypski, can't tell from the picture.