watchOS 6.1 (build 17S5054e) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2019-09-23T17:04:21Z. The update package is 709.37 MB. This is a delta (partial) update that requires 5.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 01adcdd9d5ce39d4ed72d2d9932df9020b5b2cdb.zip.