watchOS 6.1 (build 17S5068e) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2019-10-10T17:07:57Z. The update package is 321.79 MB. This is a delta (partial) update that requires 6.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 19c87b99b6eb7f5f50c4f9fa4f994273fe5dc0cb.zip.