watchOS 6.1 (build 17S5059e) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-10-02T17:09:58Z. The update package is 449.8 MB. This is a delta (partial) update that requires 6.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 370d9c3788f684e121b005e4f70e32220f4235aa.zip.