Historic Spiral Staircase

I saw this spiral staircase in 'Olde Town Edison', took a few shot of it but the presence of visitors on the stair case detracted from the image.
I made sure to note the time down the time when the facility opens. The next day I knew exactly where to go and when. As soon as the center opened I split away from the tour and took this shot.

Camera settings: ISO800, f/8, 1/25s