watchOS 6.1 (build 17S5059e) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-10-02T17:10:09Z. The update package is 742.04 MB. This is a delta (partial) update that requires 5.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 805c1fa5b58a60a76f0a4241fe5a2d57f029e3e4.zip.