watchOS 6.1 (build 17S5059e) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-10-02T17:10:06Z. The update package is 546.71 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: 66d1861d5382eb794849916def33ccb81d19f219.zip.