watchOS 6.1 (build 17S5083a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2019-10-23T17:11:34Z. The update package is 521 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: e23d445e55480a5ed852916dd2772157a3b077a6.zip.