watchOS 5.2 (build 16T5181f) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-01-24T18:07:48Z. The update package is 420.15 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: 921c74b6c62a4c348ea665b2ae9a0e483555eb55.zip.