watchOS 6.1 (build 17S5059e) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-10-02T17:10:08Z. The update package is 134.51 MB. This is a delta (partial) update that requires 6.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9f05862f1719b103fef6466cbadf4728aea830ae.zip.