watchOS 6.0 (build 17R5566a) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-08-15T17:17:04Z. The update package is 372.46 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: d06a96354649cdd0cbcf6ea681ffac72d668e522.zip.