I decide to make this one using this open support that looks some kind of floating base when you put the watch from the left hand. I decide to use two different parts to make it easy to print. You can do it almost in any printer, it is small in volumen and very stable. The photo included is my first try, the file uploaded has some design fixes and a hole behind the charger connector to make it easy to remove.

It is strong and the cable is not invisible but do not drop all the thing when the watch is removed. Only can hold the watch in its vertical position.