Wound up

This image is probably one of my favorite recent finds, and it seems like it’s been there a while. How could I have missed it? I’d probably walked down this narrow street at least 5 times that day, although I couldn’t tell you its name. As is typical for this area, the street was extremely narrow, more of a pedestrian alley, and the image was quite big and getting both girls into the shot was a challenge. Where might they be going, and how long have they got left until they need to be rewound?