watchOS 5.2 (build 16T225) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-03-27T22:03:35Z. The update package is 982.37 MB. This is a delta (partial) update that requires 3.2.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a13c94b2e3d65a3dab5e47aa0876b702ef3474d2.zip.