watchOS 6.0 (build 17R5532f) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-07-17T17:41:54Z. The update package is 674.43 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: c870173e20546d7339525ed88c58926136219b8a.zip.