watchOS 6.0 (build 17R5546f) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-07-30T17:09:28Z. The update package is 683.65 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: 469003fb072975e072d5f98ab44424bb27c024ff.zip.