watchOS 6.1 (build 17S5076a) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2019-10-16T17:13:01Z. The update package is 660.1 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: a0f153159adcabc2a2fe62a166c830f272e40e90.zip.