Open the downloaded file inside the iPhone Clockology app, and tap the Sync button to send it to your watch.

You can use third-party "clock simulator" apps available directly on the iOS App Store to display community-made replicas of Hermès watch faces. Using Clockology

However, if you want the high-fashion aesthetic without paying the luxury hardware premium, there are several workaround methods—ranging from legal third-party customization apps to aesthetic twins—to achieve the look. Method 1: The Best Free App Workarounds (No Jailbreak)