watchOS 6.1 (build 17S5059e) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-10-02T17:09:54Z. The update package is 687.67 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: 6e50d3e35b3aef47152767ca88329381c474ff6c.zip.