This is a switch in an old-fashioned telephone operator, were by choosing two-digit number, the appropriate position on the board is taken and the connection made. The idea was to shoot the parts moving between different positions. It was one of the photos I took in the small communications museum at Iowa State Fair. Click on the image to see a small gallery of old telephone related images.
Camera & Lens: NIKON D300 30.0 mm f/1.4, Flash did not fire.
Focal length: 30 mm Shutter: 1/6 sec. ISO: 400 Aperture: f/3.5