Hi Jachin, The 2nd photo you posted which shows the MD on the date and on mintmark, Just below the mintmark and to the right of the 6 looks to be a partial raised three??? I could be wrong, but i just cropped it , and thats what it looks like to me , im not sure if others can see it.
Im not sure what you have here, but i changed the color balance on the other two photos after zoomig in and not seeing it. And the 3?? still shows up, Very intresting. maybe some one will beable to give a better answer. But i would hold it. the 3? look to be raised and even outlines once i changed the color balance, as it does with the one i drew arrows on outlining it. i know there allot of ct people who due alot with errors, they should be able to give you a answer. But still cool find
Yes, I also see what you see and I have very limited capacity with my camera. Let's wait what others will say.