Approximately 3.5cm wide. This is a listing for a Seiko Tomony Automatic (with hand-winding function) men's watch. From my father's watch collection, this is a lovely antique mechanical watch with a sophisticated green metallic dial ☺︎ There may be minor scratches and clear marks from use, including on the glass surface, but as you can see, it has a good luster and is in good condition. Please examine the images carefully. The belt is a rare Tomony original stainless steel belt, and the wrist size is approximately 18.5cm. This is a very old automatic watch (hand-winding is also possible when the crown is closed), so I cannot guarantee future operation, but it is currently running without major errors (I have not performed any maintenance such as an overhaul, so please understand that there may be an error of a few minutes ※ There is also the possibility that the condition will change... that is to say, there is a risk). As it is now, it doesn't stop immediately even after shaking it well (winding it well by hand)... Quick change is also okay. There are no accessories. I think it's in good condition, but it's an old, antique mechanical watch... I am very sorry, but please absolutely, absolutely, absolutely do not purchase this if you are not used to used items, are nervous, do not understand the above explanation, are anxious, or do not know how to handle antique watches. Mercari is a place for private sales. It is a used item in its current condition and is inspected by an amateur (100% perfection is absolutely impossible). Thank you for your understanding. A popular model of antique watches ☺︎ This is a Seiko Tomony mechanical (with hand-winding function) men's watch. Please make it a proud treasure... #Seiko #SEIKO #SeikoSchoolTime #SEIKOSCHOOLTIME #SCHOOLTIME #SeikoHandWindingWatch #HandWindingWatch #MechanicalWatch #SeikoTomony #Tomony #SeikoTomonyHandWinding #SEIKOTOMONY #SeikoMechanical #SeikoAutomatic Dial Color: Green Belt Color: Silver