watchOS 6.1 (build 17S5059e) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-10-02T17:09:55Z. The update package is 687.47 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: 171d2fd0c3fe96aae1ce374f8f506297f05fcd6c.zip.