If you are in the US, they will ship from China to Alaska world shipping hub. Once there, they are cleared by customs. Then, they are flown to Louisville main distribution center where they are shipped to other local hubs for delivery.
Seems like Apple is shipping the watches in bulk to regional warehouses, then slapping on an address label for individual shipments from there.
In the past, when Apple products shipped from China, they got shipping labels in China, and you could track your own iPhone or MacBook or whatever from China, to Alaska, to Louisville, and so on.