While the big box is nice, the smaller one in the cylinder holds the watch at a vertical angle. This allows the rotor to hang freely without any lateral stress. While of course, the parts are engineered to accommodate the gold winding rotor's weight at any angle, I have a personal feeling (not a scientific one) that a fully vertical winder might be better for the watch in the long-term by a tiny margin. So, this winder is fine. But the smaller cylinder one might be better!