watchOS 6.1.1 (build 17S5433b) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-11-05T18:17:45Z. The update package is 784.46 MB. This is a delta (partial) update that requires 5.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d372257955ef814df0d1d573b83a46574a48832d.zip.