In both original and Dave's pictures the scope does appear to be the commercial 330 scope. If you can find the 3/4 and 7/8 rings a M81, M82 or M84 scope are correct for post war use. The issue with those scopes its the eye relief is not correct for use in the prone for an average sized guy.

The M73A1 scopes broke at a much higher rate than the rifles, no spares were bought in WWII, most of the DCM sales rifles in the 1960s came without scopes, hence the mounting of the commercial scopes.

None of the commercial scopes with the non-click adjustments were correct or were authorized for use. The military click sight adjusters I seem to recall had a different screw pitch, but I am not sure about that.