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 541.44 MB. This is a delta (partial) update that requires 6.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 7b7932b49fa76f70e4fb90076a41a7ea3549ff18.zip.