watchOS 6.1 (build 17S5068e) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2019-10-10T17:07:55Z. The update package is 556.04 MB. This is a delta (partial) update that requires 6.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 96455defd96b008d7ff4c5b7360931257d1f52f1.zip.