Purchased from the Netherlands at the end of the 20th century, Smurfs Blue Elf vintage clockwork manual winding alarm clock Clock face size: about 15 cm in diameter Brand: Hema Origin: Germany There is only one hand-wound clockwork knob, which was originally a clock spring and an alarm clock. So it needs to be shared alternately after turning down, and it can be loosened and removed by turning it clockwise. Turn it counterclockwise to turn it tight first, and then turn it down to wind the mainspring. The interior has been oiled and basically cleaned, and some of the exterior is worn and peeled off, please see the photo. Because this is an old item, if you are very demanding on the new and old details of the product, please consider carefully before buying, thank you.