Beautiful System Glashütte installation from the early 1900s. Very nice porcelain dial, very nice case. Comes with a nice leather strap, the strap is good for wrists up to 19cm. Hand adjustment with a change lever. At 4 o'clock you need to change the small switch, then you can adjust the hands with the crown. If you switch it back, you can wind the watch with the crown. It works. Size: 50mm measured without the crown.