watchOS 5.2 (build 16T5222a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-03-11T17:11:17Z. The update package is 486.27 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: 572bf97bf904d5f5b1b50ac80a58ad1236eacf8e.zip.