Here is the stone's Hungarian side. On top it is the border sign lines, there is a curve, the line run out to other way.

The marking is very funny, the "N" letter were painted off

The "MK" means: Hungary (M) Republic of (K) The "MNK" was: Hungary (M) People's (N) Republic of (K)

They painted off the "N" letter with big happy, and they didn't changed the stone... :-))