It was common practice to bust a wheel off on a safe to make sure someone could nor steal it.
I would think most thieves are too lazy to move 3500 lbs.
I am sure that happened some places, but there is an actual story on the busted wheel for this safe- it was being moved from Stillwater National Bank to the museum, they were rolling it down the brick street and the wheel shattered...
I can just imagine the scene in January 1975....