watchOS 6.1 (build 17S5059e) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2019-10-02T17:10:24Z. The update package is 453.16 MB. This is a delta (partial) update that requires 6.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 262504e6442eea5e3716808d0a4aeeed0547be9b.zip.