watchOS 6.1 (build 17S5054e) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2019-09-23T17:04:22Z. The update package is 709.35 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: 235b55f118178d3db29f125c45e9265c9e566f0c.zip.