watchOS 5.2 (build 16T6225) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-03-27T22:03:43Z. The update package is 125.31 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: 49e2e1ea7bf3a0bdda98bbca556f76b8c3307d5d.zip.