Limited editionr sinn watch 2300 skeletal gold chronograph alligator limited edition the creation of a skeletonised timepiece is a complicated process which has been taken to a degree of exceptional mastery in the case of the 2300 sinn watch this watch has been created so that it shows the exact time while simultaneously giving the wearer a chance to observe the mechanism solely 25 such units have been produced sinn 2300 is equipped with valjoux 23 hand wound calibre that performs 18 000 v