Ah, the good old days!
Also, note from the Morro Castle picture, there is no place for a tranport truck to pull the SS-4 to, indicating that it is, most definitely, a static display.
As for field artillery in front of the town hall, my town was having a bit of a hard time with the neighboring town over zoning a large retail development. In the middle of this argy-bargy, the artillery piece in front of Town Hall was turned around in the middle of the night to face the direction of the proposed development. Nobody owned up to that one...