watchOS 5.2 (build 16T225) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-03-27T22:03:25Z. The update package is 825.89 MB. This is a delta (partial) update that requires 4.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a3629e8b3e309a019ec40e9bf860c0d8b99c22a2.zip.