I recently got a dateless buff. I soaked I vinegar and revealed a 1918 date but just a little corner of the mint mark exists. I have seen a few examples of s mint marks that to me don't look l,e much . Here is an example : 1925-S Buffalo Nickel (XF 40) PCGS/CAC | eBay. I can post pics of mine if need be but you can't see anything more than this coin. How did a grading company label this coin s mint? You can't see any s......