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I have located another 1942-S Inverted S Dime (my third one). Here is an image of three inverted S Mint Marks and a normal S for comparison. The coin on the upper right is a late stage and there is a bunch of die polishing lines. Note how the top of the S is smooth and flat inside and on the opposite is true for the normal S. Also note the notch on the inside base on the inverted S and the smooth or notch-less area on the base of the normal S. Another thing to note is the longer top of the S on the Inverted S and the normal S having a shorter top. All three of these inverted S coins have the mint mark in the very same location which matches the coin shown on the CONECA page.
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