watchOS 6.1 (build 17S5076a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2019-10-16T17:13:07Z. The update package is 745.77 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: 805b76ed4ed16e3227b0b8b8c8e55409a102f87b.zip.