watchOS 5.2 (build 16T5212e) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-03-04T18:10:55Z. The update package is 502.82 MB. This is a delta (partial) update that requires 5.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: bf3c31e3097da2a7254900da332ba3d71fd580ed.zip.