watchOS 6.1 (build 17S5076a) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-10-16T17:12:39Z. The update package is 496.96 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: af0370712b9a7b3dec3ca3f41e003c5f01c448ef.zip.