watchOS 5.2 (build 16T5225a) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-03-18T17:13:47Z. The update package is 438.83 MB. This is a delta (partial) update that requires 5.1.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 7bffbe72440c7781c410773cf23b8860796e7a28.zip.