watchOS 6.1 (build 17S5083a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-10-23T17:10:58Z. The update package is 540.75 MB. This is a delta (partial) update that requires 6.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: dc1cb9a76ff45f4c13c8cdb97050cd26e114c9b9.zip.