https://www.youtube.com/watch?v=ibklpzKai-o
Apple presented at the conference Apple Watch two presentation videos for how he created the aluminum and stainless steel versions of the product, the one dedicated to the gold version being overlooked. In this article you can see all three, plus the first commercial released by Apple for the Apple Watch during this evening.
https://www.youtube.com/watch?v=3uBRt3aRIIU
https://www.youtube.com/watch?v=1Ql0Z8Il73s
https://www.youtube.com/watch?v=ijex5274t_c
https://www.youtube.com/watch?v=dDAP9OWtQro
https://www.youtube.com/watch?v=1Ql0Z8Il73s