watchOS 5.2 (build 16T5201c) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-02-19T18:15:55Z. The update package is 486.65 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: a6c9394d91b0053135721fe0e7940a9ffba63151.zip.