What is the fine-grained topic of the following text: Although there's a wide spectrum of materials and styles across the SevenFriday collections, with a couple of exceptions the premise is pretty much the same; large 47mm cases, square with rounded corners featuring an 'animation ring' (or the 'waist' of the watch case) and multi-part dials which use a combination of hands and/or discs to display the functions via reliable Japanese Miyota self-winding movements. Only return the topic.
SevenFriday watch collections' features and styles