watchOS 6.1 (build 17S5054e) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-09-23T17:04:00Z. The update package is 566.77 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: f9a4581a75a9af7711dfa916ee2d376ae7507759.zip.