watchOS 6.0 (build 17R5507l) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-06-17T17:11:23Z. The update package is 666.13 MB. This is a delta (partial) update that requires 5.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3e71b1e85f883836b646de144b38bd7b562be46b.zip.