The small details are making it feel more real. The buckle doesn’t seem to match the design right now.
I’m dubious of the magnet connection. As someone who bangs their watch around a bit, I’m concerned it will pop off. You could make a dirty prototype by popping the mechanism out of an inexpensive swatch and gluing a magnet in there. Then glue a magnet onto a cylinder of material. Wear the assembly for a week and see if it pops off in casual use.