This is an automatic winding wristwatch (BB-0026) from B-Barrel. I purchased it here as an unused item and kept it as is, but I am selling it to organize my collection. Since it was kept in a watch case, the belt has a slight curve from being wound. It is currently operating without any issues. There are no noticeable scratches on the case or crystal, but please consider that this is a used item stored by an amateur, and understand that there may be minor scratches not visible in the photos. There is no box or instruction manual, so it will be wrapped in cushioning material and shipped via Nekoposu. Brand: B-Barrel Movement: Automatic winding (balance wheel is rotating type) Case diameter: 40mm Case thickness: 12mm Water resistance: 5 ATM (daily life waterproof) Features, etc.: See-through case back Tourbillon-style open heart (The seconds sub-dial is skeletonized and processed into a ring shape, and by overlapping it coaxially with the balance wheel, it performs an action similar to a genuine tourbillon, completing one rotation per minute. It offers a different kind of appeal than simply showing the balance wheel.) Regulator Small seconds