Russian 2 kopecks Nicolas I - strange initials?

Hello
Got this coin last week ... and I have some doubts: https://en.numista.com/catalogue/pieces3021.html


The coins is quite worn, but the initials are still quite readable and look more like KM (or a smudged HM?) than HM or AM. And the circles on both sides are not dentilated, but this could be due to wear.


Also the edge is assymetrical, with the obverse being rounded and the reverse having a sharp edge. Is this normal with these coins?


diameter: 29,4 to 29,7 mm, thickness 2.9 (weight not known), so slightly bigger and quite thicker than supposed to be

Any ideas on authenticity are welcome!

Yea, it's normal, in 1810 it's ok.

The weight of this coin should be 13.65 g.
KM initials are quite rare, so you are lucky that you have it.
P.S. there фку no coins with initials HM (only EM, ик, KM, and AM).