Sweden 1 Ore 1912/1 Overdate?

Recently I've become interested in overdates on European coins since I figure there are fewer collectors looking here in the US.

Here's a coin that caught my eye at the recent show, due to two distinct, angular protrusions beyond the contour of the 2 in 1912.
I should note there is a documented 1912/1 overdate, and I did not see these marks on another 1912 coin, so I doubt they are shoulders on a punch.
Another interesting detail is the relief of the 2 is higher than the other date digits, which might suggest the last digit is punched independently into the die.

The two areas in question pointed out by arrows. Despite what my QX5 captures, both are quite distinct and geometric--they stood at at first glance under the loupe.



Another lighting angle. Note the distinct angular protrusion on the bottom of the 2, and compare it to the 1 on the left.
I also find it interesting how that little ding on the corner of the 1 resembles a similar mark on the protrusion on the 2--see final pic.



Making an overlay of the 1 on the left, it's interesting to note how the right-hand corners of the 1 digit closely match the protrusions on the 2:



A comparison of the a mark on both the lower corner of the 1 and on the protrusion of the 2 at the same location. Coincidence?--probably.