watchOS 6.1 (build 17S5083a) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2019-10-23T17:11:11Z. The update package is 540.72 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: 80811ad451f505fa6512d4f5712be47e3b46805b.zip.