NO! To save a watch in the Collection page >Watches section, there are only 8 required fields (ALL the rest are optional). These 8 fields (clearly marked with an * ) are required so the app can generate the great analytics & financial metrics displayed in the Summary page.
At the same time, you can save/add a watch with just ONE single input/word using the Collection page > Wishlist section. Easiest thing to do for those who just want to add a picture and a watch name.