watchOS 6.1 (build 17S5068e) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-10-10T17:07:35Z. The update package is 726.22 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: 87f8cf86043271ce650d61e7375714e2bfc812e9.zip.