watchOS 5.2 (build 16T5212e) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-03-04T18:10:56Z. The update package is 486.03 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: 7bc448c83d80e0442990a81aa91f6f4baedcd00f.zip.