watchOS 5.1.2 (build 16S5046a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2018-11-15T18:09:13Z. The update package is 595.92 MB. This is a delta (partial) update that requires 5.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 5e738d2640161e14690cc4768fa801312383f5a0.zip.