watchOS 6.1 (build 17S5076a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2019-10-16T17:13:09Z. The update package is 745.45 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: 26091b8b0a0e7c07b53dca000af2a61b59607b98.zip.