watchOS 6.1 (build 17S5083a) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-10-23T17:10:31Z. The update package is 723.8 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: 6a7ea5b9d66f73fda83b305a0dcede30533fadc1.zip.