This is a Bulova manual-winding watch. It's a men's size from back then. It feels like a boy's size. It's an authentic, genuine item, purchased from a major secondhand shop and authenticated. There is rust and peeling plating. It is currently running. The overhaul history is unknown. A different strap is attached. It is a genuine product, so please rest assured. Although it's highly unlikely, if it turns out to be a fake, you can return it. The size is: Diameter → Approximately 30mm, Wrist circumference (maximum) → Approximately 17.5cm. Please consider this opportunity☆