watchOS 5.1.2 (build 16S6046) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2018-12-06T18:04:41Z. The update package is 90.94 MB. This is a delta (partial) update that requires 5.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: bbafd4b1212e765de177de1847aac9f87cb00875.zip.