watchOS 6.1 (build 17S5083a) is an official Apple over-the-air update for the Apple Watch Series 5 (40mm, LTE), released on 2019-10-23T17:12:59Z. The update package is 358.68 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: 9624c2a1575d489a4f85809abe62b80b08e4106b.zip.