watchOS 5.2 (build 16T5181f) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-01-24T18:07:46Z. The update package is 435.47 MB. This is a delta (partial) update that requires 5.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f3259fb76aef71bbc9b327b76b3e37c8f9fe36cf.zip.