watchOS 6.1.1 (build 17S5433b) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-11-05T18:17:46Z. The update package is 599.14 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: 28ba4f0ee0b7dd84e26c161094f1584ad1a10cbf.zip.