Apple has taken care of the smallest detail of its Apple Watch, as only the most important watch brands do, and has reached the point that when we connect our Apple Watch for the first time to our iPhone, it will show us a "Certificate of Authenticity" as the one that appears in the image. Although it is not for sale yet, they have already managed to reproduce this pairing process between the iPhone and the Apple Watch, and they not only show us the certificate but also we can see the animations that will appear on our iPhone when we connect them. You have the video that shows the different animations below.
As you can see in the video, each Apple Watch model will have its own animation, showing at the end the image of the header but with the characteristics of the model (material, size, type of glass, etc.) The image is very similar to the one that appears on the back of the same watch, surrounding the sensors of the same and which is covered with sapphire crystal.
The Apple Watch pairing process can be done using the rear camera of our iPhone and the application dedicated to the watch, which has the same name, «Apple Watch». We can also add it automatically, entering its data that we will get by clicking on the "i" that appears on the smartwatch screen. The application is also fixed at the moment in which we pair it, greeting us with a "Good morning", "Good afternoon" and "Good evening" as appropriate. This application appears in iOS 8.2 and in the latest betas of iOS 8.3. It also has a section dedicated to applications for Apple Watch, but at the moment it does not show more than information about the Apple Watch. At the moment we can only see the videos that Apple includes on the website dedicated to the Apple Watch, and access more information about the Apple watch through a link to the official website of the company.