watchOS 6.1 (build 17S5068e) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-10-10T17:07:49Z. The update package is 321.74 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: e446c3e8d7c9ae71e694341a4854cdb8395775cd.zip.