The earliest Dollina 1 had an uncovered hatch release. Like the first Kodak retina, the wind on knob needs to be released to allow it to wind on the next frame. This is achieved by pressing the small button (on the left in this image), which also doubles as the counter reset when moved sideways.

Start the image spinning by putting your cursor over the "Spin" side of the image, you can pause the animation in any position by touching the "Pause" side.