watchOS 5.2 (build 16T5201c) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-02-19T18:15:50Z. The update package is 439.16 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: 8bb3cac17a29f08f3e52b224bc678438a331805b.zip.