watchOS 6.1 (build 17S5083a) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-10-23T17:10:36Z. The update package is 497.25 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: 7c24259fa31a4796fefdaebc3a78aae4ddec3729.zip.