watchOS 6.1 (build 17S5068e) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2019-10-10T17:07:50Z. The update package is 778.84 MB. This is a delta (partial) update that requires 5.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 78496ffad72e9c0f890e13d8c5b55b4abb9e65fc.zip.