watchOS 5.2 (build 16T5201c) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-02-19T18:15:52Z. The update package is 454.9 MB. This is a delta (partial) update that requires 5.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: ae9b5c258c9f8596e86b169a09af4b1f26977266.zip.