watchOS 5.1.2 (build 16S46) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2018-12-06T18:04:37Z. The update package is 187.12 MB. This is a delta (partial) update that requires 5.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 852ec62ff448ce0ba1ac7f26606db45d12dc98a4.zip.