watchOS 6.1 (build 17S5083a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-10-23T17:10:59Z. The update package is 323.33 MB. This is a delta (partial) update that requires 6.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3e79362cb9960dc1a2b64ef7207e486faabf7601.zip.